I recently found this blog entry, which explains how to use the Nokia PC suite on a Mac (via VirtualPC or Parallels):
I know there are Mac users out there like me who are complaining that Nokia does not have a Nokia PC Suite for Macs (or Nokia ‘Mac' Suite). I don't want to get into a Mac versus PC argument, but it should be made available even if we are only a small percentage of the market. So far, we resort to the iSync plugin to synchronize just the contacts and the calendar. The Nokia PC Suite offers a lot more. Fortunately, nothing is impossible. There is a way to use the Nokia PC Suite on the Mac.You'll need to download the usbfix.sh script from the above link to your home folder, make it executable (chmod 755 usbfix.sh), and then do this in the OS X Terminal:
sudo sh usbfix.sh
This temporarily unloads some conflicting USB kernel extensions, until the next reboot. Full details are available at the above-linked blog entry, of course.
Mac OS X Hints
http://hints.macworld.com/article.php?story=2007040404355956