I don't have a Blackberry yet (still waiting for January to come) so I might be saying something stupid, but you could import your contacts to a gmail account and them have the Blackberry sync the contacts from it.
People that actually OWN a Blackberry will probably think of a better solution
EDIT: See what I mean? Now we both now about Desktop Manager working the syncing of contacts!
Yes, as the previous poster said, just sync with Outlook via Desktop Manager. This is one of the core functions of DM. Just go into the sync settings and configure it however you want. It's pretty self-explanatory.