Thanks so much for this. It is freaking amazing! I was just looking for a new photo viewer in the market too.
I'm can't believe the level of fit and finish to this gallery app. Points to very good things to come!
edit: Is the camera app changed in 2.1 at all? Trying to change more than one setting is absurdly stupid on the 2.0 version. You have to change first setting, close the setting pane, then open it again to make the next change.