Add me to the new battery crew Just finished replacing the battery. Wasn't bad at all, except for removing the camera glass(I broke it). 
Maybe took 30 minutes to do and $20-25 to replace it including the tools. 

Be careful with the tools. My "precision knife" wasn't precision at all and that's what cracked the camera cover. The edge wasn't small enough to get in between the case and glass so it just put pressure on the glass and cracked it. I sharpened it with some sandpaper and it came off no problem. 