Got the 2600mAh extended battery, loving it
Innocell 2600mAh Extended Life Battery
This extended 2600mAh battery (vs the 1350mAh stock one) thus far has been great. Although likely not quite double the life, I'm no longer paranoid I'll make it though a day without depleting a battery. I'm really digging the fact that the physical extension of the larger battery also provides so many great new ways to hold the phone while in landscape mode. Of course I'm going to have to buy the Seidio car and desk docks to keep my docking functionality, but overall I have to say kudos to them for producing this much-needed Droid accessory and other supporting accessories so quickly!