iPad 2 lines are expanding quickly outside Apple Stores across the nation, a sign that initial demand for the new tablet is much higher than anticipated. The lines are already larger than last year’s lines, when the first generation iPad launched. Even Apple’s online store ran out of stock in a matter of hours. This time around, lines are likely to move a lot faster than last year, as most buyers are well acquainted with the tablet, and will require a lot less hand-holding. Besides Apple retail stores, 10,000 point of sales will start offering the iPad 2 as early as 5PM today, including Walmart, Best Buy, Target, as well as Verizon and at&t retails stores. The iPad 2 comes in 18 flavors, as Apple gives the choice between 3 different wireless options (WiFi-only, WiFi+GSM, WiFi+CDMA), 3 different storage capacities (16GB, 32GB, 64GB), and 2 colors (black and white). Update: Most Apple Stores ran out of at&t compatible models, as well as some WiFi-only models. Interestingly enough, the Verizon models proved to be less popular, as most of them are still available for purchase as of March 11, 8 PM.