A warning to all who didn't see it in the release notes: Installing parallels desktop on 9A499 will make your system unusable. I had forgotten about this and I went on to install the latest Parallels beta anyway, and it froze during installation. I had to do a hard shutdown and when i turned the mac back on, it would get to the blue screen and spin the grey loading icon every few seconds, never making it to the login window. Good thing I have a backup... I think I might just go back to Tiger for now.

I have no such Problems with newest VMWare and Parallels on 9a499

VMWare Fusion Worked Fine.

Yup, fusion worked, although I had major problems with that too, which led me back to Tiger.
I couldn't install Solaris in a VM (Fusion froze up, needed to reboot the Mac), for instance... Tried twice. It worked without a hitch under Tiger.
Also, I had a problem where I couldn't redirect input to the VMs at all, a reboot helped again. Lots of rebooting, though...

Thats why I switched back to 10.4.10.. I need parallels.

on another note.. Paralells doesn't work on the new intel chip set for some reason..

http://kb.parallels.com/entry/19/501/