Microsoft have let loose the GTA IV theme and picture pack for Xbox 360 owners. Good news is that both are completely free to download!
Just go to your Marketplace blade -> New Arrivals -> Grand Theft Auto IV ... and there they are.
I don't have my capture card set up, but I just snapped a few photos of what they look like, apologies for the poor quality but see my flickr photostream for:
Sorry mate, but girlfriends have unfortunately already been confirmed...
On topic, over half my friends list on Xbox Live are now using GTA IV gamer pics, so confusing when looking for someone
I think the theme suits the dashboard really well, the only thing I'm not to keen on is the the background for the guide button.