Here are a couple of serious suggestions. I've been playing with this app like for 2 days in my N95-3, and I must admit it was great.
However, first of all, maybe you could use it instead of the default gallery application, so it could be opened by the gallery button on the phone.
Video support would be great.
An improvement on the folder view, like folder name on top, and a better looking separation rather than the empty black spaces.
On the time view, the month name on top would be great.
I had to open 3 times the application to make it fully open my photos smooth, everyone with a lapse of 5 minutes.
Face recognition is quite impressive, and it surprised me, since I firstly thought they wouldn't work very well. Even though, there were some issues when trying to recognize faces of people with long hair, there's no recognition on side faces or slightly cutted heads.
Weirdly, it could recognize things that were no faces, and didn't even look like one.
On non-touch devices, zoom capabilities are totally missing.
Still, great work!