If you're looking for brushes to use in photoshop then check out these (courtesy of a user on a yahoo group I'm a member of):
Adobe Photoshop Brushes - there's also lots of other goodies if you go into the other categories listed on the right.
Through the above website I also found Graphics-Illustrations if you join the 'Green Blub Gang' (it's free) you get a link to your email for free downloads/brushes/tuts. I haven't had a chance to go through it all yet but it looks good!
Just thought I'd share x