There's really no need for questions or discussion about this. It's a very simple thing. 😉
1) Everyone with a MacBook Pro is still under hardware warranty, since all new Macs come with a one-year hardware warranty and the MBP has only been in existence for a few months.
2) If your battery is bulging or in any way malformed, and it wasn't caused by some form of accident, you have a hardware defect.
3) Therefore, anyone with a battery that is bulging or in any way physically deformed (again, not caused by accident or abuse) is covered under the MacBook Pro's one year hardware warranty. Call Apple Support, be polite, explain the problem, and if you aren't told that your battery will be replaced, ask to speak to a supervisor or to Apple Customer Relations. Remain polite and calm, but be firm: you have a hardware defect and your warranty
will cover it.
A replacement battery can be provided by a retail Apple Store or by the support people who you call at AppleCare.