Weird. Mine works fine. I used to have this problem with my HTC EVO 4G when I used a cheap charger I got from eBay. I'm sure you did and I doubt it matters, but have you tried changing your charging source? Ie. not going to a nearby outlet, but maybe another one on a different side of your house or in another place.
Try a different USB cable. My home cable charger does this but not my work one. Also pressing the power button several times to just put the phone to sleep/wake it back up sometimes makes the screen responsive.