Well, I made the switch yesterday to gmail and google calendar.
All my email is being forwarded to my google account, and when I hit reply my messages appear to others to be coming from whichever account they sent the email to. That’s handy. Also, I found an app called Companion Link which lets me sync my PDA with google calendar.
Now that my email (and contacts) and calendar are online I am ready for the Opera browser for the Nintendo DS which is slated to hit the US in January. The only question is if I will miss the pdf viewer and, of course, the ability to see my calendar, etc. without a wireless connection.