Alright, so I took the bite and installed the new OS
Virus TI Snow OS4(beta) - Mac Pro running OSX 10.6.2
Ableton Live 8.1.1 - It works flawlessly. Even the GUI bugs mentioned earlier in this thread seem to be fixed. My old projects are opening fine, nothing screwed up. The features work as intended to.
Logic 9.1 (32-bit) - It opens fine. Haven't tested the sound or features. No GUI bugs.
Logic 9.1(64-bit) - The AU manager doesn't find it by default, if you fired up in 64-bit. Switch to 32-bit mode first, let the plugin authorize and then switch back to 64-bit. Seems to be working fine then.
Have fun leetle girlies, I'm going to be combing my distorted vowels all day