There is a way to charge your iPad via USB on a PC, even with the screen on. Google 'Asus AiCharger' and download it. Install it and you iPad will now charge like from a wall charger. What it does actually is to watch out for your iPad. When you connect an iPad via the USB, the program recognizes it, and tells the computer motherboard to provide more power to the USB socket. The iPad, receiving the extra power, will stop saying 'Not charging' and will show the charging icon instead. Charges almost as fast as the wall charger. Note that even though the program was designed for PCs with Asus motherboards, a lot of people have been using it on non-Asus ones problem-free, including me. BTW, I am running Windows 7 Ultimate 32-bit on a Sony VAiO.
- Sent from my BRAND-NEW iPad 2!