Just for info, I just got my battery changed, after 2 years! My MB White CD's battery was a little deformed (bulging), and I immediately called AppleCare, after talking for less than 10 minutes (with someone with a heavy slang, later found out the call was directed to Apple Europe), they agreed to replace mine and gave me a case number. Got my new battery few days later.

For info, my AppleCare expired last month! Apple ROCKS!