Noticed that newPad doesn't appear to charge at all well from USB while being used. Tried a number of older chargers out of curiosity: stock iPod charger & iPhone 4 charger (both 5v 1a) result is power drain while iPad in use, and several hours to charge while not in use. iPad 10w (5.1v 2.1a) charged very slowly while iPad is in use.
I hope some faster chargers appear.
I hope some faster chargers appear.