The Missing Sync for Palm Pre auto-syncs data when the Pre is close to your Mac, and supports exchanging information with iCal, Address Book and Microsoft Entourage. It also synchronizes music and video from iTunes, ring tones, images from iPhoto, documents and more via USB.
The beta version of The Missing Sync for Palm Pre for the Mac is available as a free download at the Mark/Space Web site. The final version will be priced at US$39.95.