Hi bahir, I know you mentioned that you are not interested in the hp's music player or camera but just to put in my 2-sens worth - I'm using SE W850 and apart from the normal syncs (iCal and Address Book) which I don't use but I believe is good, when the W850 is mounted I can import photos taken with the W850 to iPhoto easily (iPhoto treats the hp as a digital camera and asks if want to import) and transfer iTunes playlists with iTuneMyWalkman (a 3rd party app which I believe is freeware).

I just love it when different gadgets work well together.