Rocket vs Rail looks interesting, but still seems a little buggy. Q3Zoo looks like it could be a fun mod. It has a few minor bug fixes and a slight visual tweak for Team Arena users. The latest version is ready and available. Version 1.8 adds mod support for PwrWeapons and fixes a Team Arena glitch.
Some minor bug fixes as well.
Win9x users will be happy with this version. Currently, i am working on support for the PowerWeapons mod. I have also noticed an interesting new mod called BouncyQ3.