I have pre-ordered Parallels Workstation for Mac OS X, based on my positive experience with the Beta. However, given that I have already committed to buy, how about throwing me a bone and dropping me an email when you update the Beta releases? It's a little frustrating to keep on hearing about the Beta updates from the Mac news sites.
paralles newsletter subscribe to parallels newsletter, then you will get new beta releases. See the top page.
I did get a notice by e-mail and I only signed up to this support board and registered for the beta key.