TuxDistro.com is a free Linux Torrent Tracker that also hosts a wide variety of Linux Virtual Machines.

http://www.tuxdistro.com

"The DistroWatch web site was first published on 31 May 2001. The concept started as a very simple table comprising of 5 major distributions and the chart only compared a few features (price, version, release date) and a few package versions (Kernel, KDE, Gnome, XFree86, Apache). Trying to make it slightly more comprehensive and useful (and failing to find anything similar and up-to-date on the Internet), I have kept adding more distributions, features and packages until the table reached fairly reasonable state in terms of information provided. At that stage, I decided to share the table with the Linux community worldwide and moved it from a spreadsheet into an HTML document."

http://distrowatch.com/

http://distrowatch.com/dwres.php?resource=about