There are still a few days left for the presentation of Adobe's Creative Suite 5, but that's not why we're going to stop looking for resources to use with any of the previous (and equally great) versions of the Adobe suite.
Brushes left over from the jump should work fine in any Creative Suite higher than 2, although perhaps they are also compatible with the previous ones. I have tried them with the CS4 and without problems, so the usual, I hope they are useful for your work ...
Source | designm.ag
High Res Spray Paint Brushes (18 brushes)
Messy Spray Paint (10 brushes)
High Res Spray Paint Brushes (30 brushes)
Spray Paint Splatters (27 brushes)
Go Media Spray Paint Brushes (7 brushes)
High Res Spray Paint Brushes (5 brushes)
High Res Spray Paint Brushes Set Two (6 bushes)
Spray Paint Brushes (25 brushes)
Spray Paint Brushes (8 brushes)
High Res Spray Paint Brushes (10 brushes)
Spray Paint Brushes (30 brushes)
Spray Paint Brushes (20 brushes)
Spray Paint Brushes (20 brushes)