One of the benefits of the installation of BoxeeTV on an AppleTV, is that XBMC (Xbox Media Center) HTPC Software is basically already installed onto your AppleTV. Remember that BoxeeTV is based on XBMC's code, so it makes the install that much easier. XBMC has been around since the original Xbox days, and what initially began as software exclusively for modded Xboxes to have a HTPC frontend (in the pre-Xbox360 days) has since expanded to a multitude of platforms and branched development items such as BoxeeTV and MediaPortal. XBMC is fully open source, which has clearly been embraced among the community while still maintaining to develop on their own.
More info: How to install?
Source:→ Missing Remote