Microsoft's semi-official solution for the Kin's Mac syncing is by Mark/Space, the company behind Missing Sync. Since Kin's a Windows Phone, we're guessing this is what Windows Phone 7 Mac syncing will be like. (A cop out.)
What Mark/Space is bringing to the table sounds solid: full photo syncing with iPhoto, iTunes music syncing (albums, songs, playlists), and automatic conversion to shove movies onto there.
But since they're the "exclusive provider of Mac media sync software" for the Kin, you can pretty much leave any hopes of Zune software—and Zune Pass along with it—coming to the Mac anytime soon, which is what we really wanted. Ah well. [Mark/Space]