Slightly OT, but I've just finished playing with Qtopia Desktop. Never tried it before, b/c I'd been mostly with the Sharp ROM, and the one they provided sucks.
Anyway, I'm happy that it sync's well with the Hentges ROM I currently have. I'm REALLY happy about the "Outlook plugins"--they work great too. For upcoming v.2.1 ROM, I'd sure love to see support for notes and e-mail too. . . if not in the Desktop app itself then Outlook plugins for them.
On another note, I think with a little work Qtopia Desktop could be a capable PIM app in its own right. There are plenty of QT-based projects that would allow you to add the necessary functionality (Aethera comes to mind as one that had potential that was never given a chance). If there was a Qtopia Desktop app that could handle calendar, contacts, to-do (which it does already, obviously), e-mail, notes, documents (I like this feature), and maybe RSS news, I'd ditch Outlook no questions asked.
My two cents. . .