gXiso is a Free Software to extract and upload Xbox ISO images to a Xbox.
It can read from rar, zip, gz and bz2 archives without using any disk space, the transfer speed will be near the maximum possible speed on your system.
It is available for both Linux and Windows.
Current version is 1.5
new: Read from RAR archives.
Source (For Linux)
Windows installer
report any problem/suggestion : project page
Windows version here
Linux: Python 2.0, PyGTK 2.0, GTK 2.4. unrar or (better) rar to be able to read from RAR archives.
Windows: All is included in the installer. But you need WinRAR installed to read from RAR archives.
Thanks to: Daniel Nylander, Roald Amundsen, Roberto Inzerillo, Kristian Hermansen, Olivier Noblanc, KaYa.
Tools used: python, glade, anjuta, vim, subversion, gimp, nsis, scite, tortoisesvn, icon sushi.
Berlios,
GnomeFiles,
Freshmeat,
xbox-scene,
gueux.be