The atv-bootloader team have today launched atvusb-creator, which creates USB flash drive based installers that include patchstick, factory restore and various Linux distributions.
This version is comes with ssh, bin tools, and two plugins (XBMC for Mac and Boxee for Mac). That’s right, two full blown OSX applications with their own AppleTV plugin to launch and get updates.
Currently, it is only available to run on OS X, but Linux and Windows versions should be following within the week.
Download it https://atvusb-creator.googlecode.com.