Epic's Brandon "GreenMarine" Reinhart updated his .plan again, with details on a "runes" style system he's working on for Unreal, as well as details on the new interface for Mutators. Here's an excerpt:

I'm working on a rune style system for UT. Instead of "runes" I'm calling them Relics. Anyone working on runes for UT will probably want to hold up and wait until the Relic system is ready. It'll allow mod authors to quickly make new types of Relics that server admins can download and add to their games. I'll have a set of guidelines for writing new Relics. The Relics may not ship with UT since they'll need a good bit of testing for balancing. Relics will be the "official" method of adding runes to maps and can be added to any gametype (DeathMatch, CTF, etc).