This might be a workaround for the MS decision to cut wireless synching from ActiveSynch 4.
You just set up the PPC to sync over the internet. Of course, MS may decide to block this up too...
http://www.ipaqhq.com/forums/showthread.php?t=162
I tried it, and it seems to work just as quickly as a cradle sync.
(The info comes courtesy of our chums over at the sister site Ipaq HQ Forums....some of us own both!)
Regards
Martin