I don't know if this was discussed before but I would be nice to have some basic image processing tools readily available.
This would support reviewing of images quite a bit.
Resize (batch resize)
Other than that I like what I have seen so far. I have downloaded Version 0.005 (Jul 3 2008) and I use OSX 10.5.4 and QT 4.4.3
Have a nice day,