Sync?

I use 3 computers regularly.... a work laptop, a home desktop, and a Treo. I've been trying for awhile now to get all my email and PIM info synced on all 3 at all times. I've got everything in Outlook but still haven't found the perfect solution. I switched from POP to IMAP a few days ago. That's a big help with email. Now I'm trying hosted exchange server with www.4smartphone.com. It looks promising so far, and there's a 15 day free trial. What do I have to lose??