Charging your iPad from your laptop USB port not mission impossible
2010
My largest dissappointment upon the acquisition of my iPad was the realization that my laptop didn’t have enough oomph (technical word = amperage) to charge the iPad.
Well no longer!
Major motherboard manufactures have started to release drivers that increase the amperage of your USB port to charge an iPad.
Links and more info here -at macrumors (that one worked on my Sony laptop) and Lifehacker.