Here's a set of 600 icons. Most of these are generic icons made from various sets, ie Leopard/Mac/Linux... etc. Most of the credit should go to the original creators of the base icons.
Icons can be used for UltimateLaunch, iFonz, etc., VGA and QVGA, formatted at 128x128, 72x72, 48x48, 32x32, 24x24, and 16x16. Most of the icons are named as I found them, so some might not make sense. If you go through them all I'm sure you'll find an icon suitable for every app you use.
I'm working on a round version of the set which I hope will be done by next week.
One small note. Since I'm a perfectionist I feel I should mention this. I messed up the icons a little and didn't realize it until I finished all 600. On the corner edges there are some extra gray pixels. At 48x48 and smaller you really can't notice them. Also, it really only shows up against a light background as seen here:
Download the icons and 128x128 png files here:
http://www.mediafire.com/?joeou2bgzlj