Not that I know of. The whole iPhone/computer relationship is supposed to be managed by iTunes. If you can't sync your iPhone, how do you get music, contact, calendar, etc. on it?
Bummer. I had synced my iphone with my G5, reinstalled the OS, couldn't find my tiger disks, stuck on 10.3.9....guess I'll just HAVE to get leopard this weekend . thanks for the help