While playing around with Icon Composer in the newest version of XCode Tools for I noticed that Leopard now supports 512×512 pixel icons – much larger than the older 128×128 pixel icons. I assume this has to do with the Cover Flow view for the Finder which displays icons much larger than the other views. Sure enough, Apple have redesigned all their icons for the new format and they look gorgeous. I took some screen grabs of my favourites. Click the thumbnails to see the details. Notice the small text in the iTunes and Dictionary icons and the textures on the truck and the guitar. Hawt!
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Dictionary
Garage Band
iTunes
TextEdit
Transmit