iFixit just published the first part of its usual disassembling procedure for newly released models. they started with the MBP 13":http://www.ifixit.com/Teardown/MacBook-Pro-13-Inch-Unibody/814/1
The most interesting point is the battery:
This is a 6000 mA.h unit. It would be interesting to check if one check graft this new battery on the previous Unibody MacBook model
