It doesn't sync them per se - unless you syn with your google contacts first - but it does integrate them.
What's the difference of sync vs. integrate? Does anyone know if there is an app/hack/mod to make your Contacts sync with Facebook?
The difference is that it won't add new contacts, but will update the ones that are already on the device. A full sync will not only update existing contacts, but add any new ones created since the previous sync. There are a number of apps that sync FB with your contacts and allow downloading of your friend's profile pics, as well.