A word of caution. Those pressure washers found at the car wash have been known to strip paint from panels so be cautious. Stickers that have been on a bike long term with sun exposure will be less likley to come off easily. I had great results with hand removal and Goo be Gone. Once the adhesive is removed, clean the panel with soap and water and then go over it with a cleaner wax to make sure the panel is completely clean - wax as normal.
Goo be Gone got rid of my stuborn Kerry sticker with no special techniques....WD 40 didn't do the trick but I heard it from Buzglyd and longride that WD works on W stickers though. Had to get rid of the Kerry sticker cause of my promotion on the 31st of this month.. i.e. it's not politically correct for my new postion and parking pass.