I got a hard case at Best-Buy (their Rocketfish in-house brand) and it is VERY form fitting and tight, so I was worried that it might not fit with my extended battery and accompanying back. But, there is so little difference between the two batteries that the case fits perfectly!
Now, I am going to be on the lookout for a dock that will work with the case on (I doubt the official dock will do that since the sensors on the side are now recessed a bit).
Now, I am going to be on the lookout for a dock that will work with the case on (I doubt the official dock will do that since the sensors on the side are now recessed a bit).