Glyphish — Icons and resources for iPhone developers: iPhone toolbar icons are 24-bit PNGs with an alpha channel and dimensions of about 30 × 30 pixels. The icon’s mask (the parts of the image which aren’t fully transparent) is styled to create the normal and active button states. (via r2witco)
Given the huge popularity of the iPhone, I’m actually quite surprised that it took so long for the existing freeware icon scene to move across from the desktop world. But this is a fantastic start.
