I've been looking for a way to grab my Facebook profile pictures in to my phonebook for ages without success.

Just spotted FaceSync, dont know how I missed it!

Works well and so far seems very reliable and ..... It's FREE

Sync photos for your iPhone contacts with your Facebook contacts. Shows your friends latest Facebook profile photo when they call you!

Intelligently matches your iPhone contacts with your Facebook contacts using a sophisticated matching algorithm combined with a database of nicknames. Simply load up the app and start syncing out of the box.

Saves your syncing preferences so next time you can update all your contact photos in one click