Microsoft releases software for xbox amateur games (http://gear.ign.com/articles/725/725557p1.html).
Good side: more people will get interested in amateur games. Bad side: it was supposed to be "amateur" games...
I know paid software existed before (eg Thegamecreators (http://www.thegamecreators.com/)) but it didn't have the amateurs as its target group.
blogged about it this morning (http://xiigames.com)