Here are a few more Photoshop brushes resources for your brushing pleasure.
Kloud-Nine Brushes: Kloud-Nine offers 27 sets of free adobe photoshop brushes for personal use. Some of the sets are “Needles and threads”, “Branches”, “Burned Stationary”.
Honeypot brushes : A large collection (about 70 sets if I counted correctly) of sweet free photoshop brushes from Honeypot.
Damneddiblack brushes: A superb collection of mostly retroish brushes. The quality of most of the sets is amazing.