Thanks to David Simon for letting us know that Marathon Resurrection, a group porting Marathon maps to the Unreal Tournament engine, have relaunched their site. Unfortunately, my browser isn't letting me get past the first page, but I'm told by assorted reputable folk that they've got new pictures, screenshots, movies and text content, so go and try your own luck.
Update: Mojo tells us that the problem's with Netscape, so go in with Internet Explorer or iCab if you've got 'em.