And it seems that people are downloading it like crazy, since when I clicked on "download" I got a 509 Bandwidth exceeded message.
If you would like to download GIMPShop, here are some mirrors for you.
Update: While GIMPShop is no longer the featured download - it can still be found listed on the Apple website.
For Windows 98 + For Linux (RPM) For Solaris For Mac OS X - Universal Binary! (Mirror of Mac OS X Binary) Source Code