I've written a Facebook application to sync friends' photos through to the G1 (via GMail) so that your contact book looks a little prettier.
You can have a go with it here: http://apps.facebook.com/androgyny/
I've only two friends with G1s so it could do with some testing... Any suggestions gratefully received!
Sorry if this looks like an ad, I needed a forum to recruit technically literate users - it's free and carries no ads apart from those Facebook serves. I figured if I was doing it for myself, I might as well share...