OS/X 10.5.3 has google contacts sync, but 1) only if you’ve connected to an ipod touch or iphone, and 2) only when you sync an ipod. Lifehacker has a workaround.
Second, for whatever reason, this update causes erlang R12B2 to bus error at startup if you’ve enabled Hipe. Bummer. Workaround (courtesy of Geoff Cant): recompile from original source without hipe.