For details about what a BSP Marathon is see Debian-Devel-Announce. It might be also a good idea to have read the HostingBSP howto. It gives some ideas what background work is needed to host a BSP.
Some useful links:
Vorlon's Bug Squashing HOWTO
Etch Release BSPMarathonEtch
Lenny Release BSPMarathonLenny
Squeeze Release BSPMarathonSqueeze
Wheezy Release BSPMarathonWheezy
BSPMarathon (last modified 2011-12-28 01:17:36)