The 5DII is also said to have better ISO noise performance in low light.
The 7D has more focus points (19) and faster frames per second, however whether you'll actually need the 8fps depends on what you shoot...

The 5DII also does not have a built in flash, so if you don't already have one, you'll need to get an external one (I would highly recommend this anyway..)


Cheers,
Cecu