From gtkpod iPod Manager

Source

• Official release
• Current development

Unstable or Third-party builds

Unstable/nightly builds for Fedora and Ubuntu are uploaded to sourceforge and represent bleeding edge development. While effort is made to ensure development compiles and runs before uploading, no guarantees are made that these releases will work on your system.

Ubuntu

Flavio maintains a repository of ubuntu-related software, including builds of gtkpod.