Fantastic software. I've been looking for a good viewer like this for a long time. Fast, clean interface, keyboard navigation, auto resizing of window when zooming - awesome!

Three items I'd love to see addressed:

1) full screen doesn't work in Leopard. I'm sure this is high on the fix list.

2) Add basic editing features like lossless rotate and crop.

3) Add a thumbnail view option with a slide control to adjust icon size.