dzjeezis, you guys are so lucky. I'm working on a MP 2009 8core. Upgraded to Snowleopard and since then my CS4 has been working like a windows app. It starts up in 18 minutes. I am not kidding, I timed it. I did a clean install of a new download from adobe's site, no luck. It still boots in 18 minutes (sometimes more) and every action that I do gives me the beachball for 5 seconds. Every action, from opening a file to selecting a layer.
So I am very happy for you that your's work like a charm, mine is broken. I am definitely downgrading. Since my printer, my scanner, my CS4, my Logic Pro and several other apps are not working properly or not at all, and since I don't notice speed improvements under the hood, I'm rolling back. The really bitter part of it is that timemachine isn't working as well and you cant simply perform a rollback but you have to do a clean installation. With a format.
Guess I'm F-worded and you're not. Must be my lucky charm.