What exactly are you trying to accomplish? Wireless sync or USB. If your after wireless sync with M$ 2008 you need connectivity with an Exchange server or third party Exchange host (see sponsor forum) I haven't tried yet but based upon how awful M$ 2004 is with Exchange I'm wouldn't get my hopes up.

For USB sync I use Desktop Manager on my work notebook and Missing Sync for BlackBerry on my MacBook to sync with Address Book and iCal, works just fine under Tiger and Leopard.