Sorry, I use Outlook 2003 and since I can export to vCard, I assumed you missed the function, BUT, turns out I have this add-on called MessageSave automatically installed in my Outlook from my work's pc image:
http://www.techhit.com/outlook/expor...vcard_vcf.html
It's shareware, but it's a 30 day free trial. The trial only allows you to export 50 contacts at one time, but no biggie, just export 50 at a time until you have them all done.