Just got back from the Verizon store with my new extended battery. It's a 1930 mAh that replaces my orginal 1500 mAh battery. The battery and replacement door make VERY little difference to the phone. It also fits in all the case's without a problem or being noticeable. Best part is they gave me a 25% discound on the battery!
But the size difference is essentially nothing. Looks like it came standard. There are some pics in the other thread, I believe.