From Engadget Mobile: http://www.engadgetmobile.com/2007/08/02/the-missing-sync-now-plays-nice-with-wm6
Version 4 of The Missing Sync by Mark/Space has just been released with support for Windows Mobile 6.
The Missing Sync allows Mac users with shiny new WM6 devices (as well as older WM devices) to syncronise their contacts, email, sms, photos, music etc. with their Apple Macintosh personal computers (see what I did there?).
For more info on The Missing Sync and it's full list of features check out: http://www.markspace.com/missingsync_windowsmobile.php