Also check your seat position. If it's pointed downwards towards the front too much it could cause you to lean into your handlebars, thus sore wrists.
I was going to suggest that you check this as well. I was having some 'girly-bits' soreness, so I slightly tipped my seat foward (very, very slight) and all of a sudden, my hands were going numb. Putting my seat back eliminated the hand trouble immediately.