Sorry, didn’t mean to sound rude. :( It sounded as though he got kicked off the forums for trying to post this before, and perhaps it was perceived as spam or plugging a blog. I was just saying why I thought that might have happened. I should edit my post so it comes across better.
There are CS4 betas out, such as Fireworks and Dreamweaver, but not for Illustrator (unless you’re from a company that tests their stuff under a NDA). Now that CS4 is officially announced, the software is no longer in beta and will be on shelves not too far off. They then will have trials you can download, but they currently don’t. If you go here, you can pick a trial and put in your contact info for Adobe to let you know when the trials are available.
Lynda.com has some CS4 videos previewing the new features too, very cool stuff.