PortableApps.com announced yesterday the release of their portable version of the Gimp 2.2.13. From the announcement:
This new release updates the included GIMP to 2.2.13, adds Vista compatibility, correctly cleans up GTK’s bookmark and thumbnail files and features a greatly improved startup speed thanks to the new launcher’s plugin processing. And, it’s now packaged in PortableApps.com Format so it can easily integrate with the PortableApps.com Suite.
If you don’t have a portable computer, or if your only computer is someone elses, having PortableApps is the next best thing, seriously. Go check it out!