According to this post on the MSDN blog, it looks like we might finally have a chance at synchronizing Windows Mobile 5 devices with Outlook's Business Contact Manager update. 

It seems (to me) like Microsoft sort of ignored this issue for this entire version of Outlook, since most of the post's focus is on Outlook 12.  It's too bad, I bet there are a number of customers turned off enough that they won't come back...

It says development for Outlook 2003 is 'currently under development', but I can't imagine it will get much priority since a whole new version of Office will be released...they'd be retro-fitting to Outlook 2003 when the marketing guys are pushing Outlook 12??