Rainy day blues aren't enough to stop demand for the iPad 2.

According to analysts from Piper Jaffray and Deutsche Bank, the iPad 2 completely sold out in its first weekend on store shelves. Now exactly how many iPads “sold out” amounts to is anyone’s estimate at this point.

• Wedbush Securities analyst Scott Sutherland says he “would not be surprised” to learn that the iPad 2 sold 1 million units in its debut retail weekend. {Reuters}
• Piper Jaffray analyst Gene Munster puts the number at 400-500,000 iPad 2s sold, compared to 300,000 of the first generation iPad. {CNN/Fortune}

Munster goes on to make several estimations, but they’re based on a sample size of 236 people – down from 448 respondents last year. Depending on which sales estimates you believe, that’s less than 1/100th of 1 percent of all purchasers at best. While the findings point to a strong surge in interest in the latest iPad, it’s worth keeping in mind that this means it’s probably not a large enough sample group to draw a highly accurate, apples to apples comparison, but here are the general trends from the survey:

iPad 2 purchasers are more evenly split between Mac and PC people (51% and 49% respectively). For the original iPad the buyers were more heavily Mac users (74%)

No one is abandoning their iPhone for the iPad. Of the 65% of purchasers who were also iPhone owners, 100% planned to use both devices.

No one is abandoning their computer either. 97% of people purchasing an iPad 2 – up 1% from last year’s iPad purchasers – will use both their computer and iPad. Sorry media guys, no one’s totally abandoning the internet for apps. Especially since…

Surfing the web remains the primary activity people plan to use their iPad for. That’s according to 38% of respondents, up 1% from last year. Don’t let that stop you from making interesting apps though: last year only 9% of people listed apps and games as what they’d primarily use their iPad for, this year it’s up to 17%.

What nearly everyone agreed on was that if you didn’t get an iPad 2 this weekend, you’re pretty much out of luck. All of the analysts who called stores for spot checks reported that all of their iPad 2 stocks had been depleted, and weren’t expected to be restocked right away.

The key takeaways for anyone on the content side captivated by the power of the iPad are that it’s definitely a highly desirable audience (the higher priced 32GB and 64GB versions gained popularity at the expense of the entry level 16GB iPad 2), but it’s not an excuse to abandon the open web for more controlled apps.  Though now might be a good time to work on mobile and tablet optimized versions of websites for said open web.

iPad 2 line image via Engadget

Yesterday was the big day when that mysterious “2” invitation was confirmed to be for an event launching the iPad 2. Okay, so it wasn’t that mysterious, but there was one surprise. Notably, it was that Steve Jobs delivered the presentation. Though the stock price of Apple spiked on Jobs’ appearance, many financial analysts are saying it actually created more confusion that relief. For many people, Steve Jobs is Apple. This is of course not true: Apple has thousands of employees, Jobs is a very important one, but by no means the only one. Still, the thought of Apple without Jobs, who has been dealing with an undisclosed medical condition believed to be cancer, is feared by investors who’ve been demanding a succession plan.

While the iPad 2 is thinner, faster and presumably shinier than the original iPad, there weren’t too many seriously groundbreaking features, so Jobs’ appearance may have been a way to make up for that. Some believe an iPad 3 will be here before year’s end (Apple calls 2011 the “year of the iPad 2” so take that as their rebuttal), so it may also be the extra bit of star power needed to push people off the fence.

In case the actual features and reviews are what you’re really interested in though, here’s a roundup of everything iPad 2.

iPad 2 First Hands On {Engadget}

“This thing is insanely fast. We’re not joking — it’s blazingly fast. Everything the iPad 2 does feels like it’s on turbo. We’re uploading a video of the some evidence of this, you’ll be appropriately stunned.”

Visit Engadget for additional videos and closeups.

Why Steve Jobs Emceed Another iPad Pep Rally {Fast Company}

“For many Apple-gazers, the most notable aspect of Wednesdayâ€s iPad 2 launch wasnâ€t any particular feature of the upgraded device. Nor was it the fact that Apple was launching a v2 less than 12 months after it unveiled the first version of its new tablet; it was the command performance by the person who made it: CEO Steve Jobs.”

iPad 2: All the Details {Gizmodo}

“Contrary to the rumors, the new iPad 2 has been improved a lot internally. Faster processor, faster graphics, HDMI Full HD output, the 720p HD camera on the back, the frontal VGA camera… it’s quite a new beast.”

Apple announces redesigned iPad 2: A5 CPU, 2 cameras, ships March 11 {Apple Insider}

“The new iPad 2 will be available in two colors — black and white — and will be available on both AT&T and Verizon 3G networks from day one. It also sports the same 10-hour battery life. A new accessory cable will also offer mirrored HDMI video out to HDTVs for 1080p high-definition output. The $39 cable allows users to charge their iPad while using the video out feature. Another accessory announced by Apple is a magnetic “smart cover,” which covers the front of the device. Covering the front of the device automatically locks the device, while taking it off will unlock it. Microfibers on the screen cover are said to clean the iPad 2 display, while magnets will automatically align the cover on the screen.”

iPad 2 will be at Best Buy at launch (Update: Sams Club+Walmart) {9 to 5 Mac}

“In case you want to sit in the parking lot of a Best Buy rather than the parking lot of an Apple Store: Best Buy will have iPad 2 at launch.  Wooo!”

What was MIA from the big iPad announcements today? {TUAW}

“Life is not all about fawning over every move Apple makes (despite what it feels like some days). As I step outside the Reality Distortion Field, there were some things I wanted to see Apple include.”