Decent design, not too keen on these bits though-
I would try to find something that looks more natural, at the moment I think you can tell they where done in Photoshop with a brush. Doesn't quite have the rough natural grungy effect I think it needs at the moment.
Quick thing-
I noticed on this mock and also on your portfolio site, no home page link? Just seems odd to me, was looking at your portfolio earlier and was looking for a link back to the home page (not keen on having to hit the back button all the time).
Nice work though.