Just a heads up: Despite the "Not Charging" shown in the upper right corner when you plug the iPad into a PC, it apparently is actually charging.
I've enjoyed a similar experience as described in the link. It seems to charge just fine, especially when the screen is off, despite the 'not charging' warning.
One of my colleagues asked about this at an Apple store and the "genius" on duty showed him a 16 port USB hub that they use to charge iPods, iPhones and iPads. He said it looked like the same technology that had just been released in a device from Datamation Systems. I saw a press release about it recently. I think it is called the PowerPad 16.