for some awesome brushes go to the following link. Also, remember to post appreciation and let the artist know how you used the brushes. they love to see what can be created with their aritistic help.
http://www.deviantart.com/also i remember a filter that used to be good for those dots by adjusting the settings. heres the link for it as well.
http://www.angelfire.com/ca7/dfgraphix/VMToolbox.htmlit has a ton of options. ENJOY !