Yes. Export your Pre's contacts to a .csv (?) file. There is a patch in Preware for this.
Again, this patch is in Preware.
Then log into Google, and import your csv file. I actually deleted all my google contacts previously to limit some dupes in the google contacts since google syncs to the Pre and they are listed there already. If your unsure, or uneasy about deleting the google contacts from google before you import, simply move them to another group as a temp backup...
Be aware that you will have duplicates on the Pre, they will automatically 'link' the profiles and show as one contact, but there will be several profiles. Cleaning up takes time but I don't even bother cause again, it'll only show up as one contact. This is because you'll have the profiles in google and facebook which syncs to the Pre. (assuming you have google & facebook syncing).
Hope this helps.