i know about peach-blush.org, but are there any other good sites?

Wow, that is really a loaded question...lol
there are tons of sites with psp7 brushes.
but start here... http://www.psplinks.com/content/Brush_Downloads.html

~Lana~

http://1greeneye.net/brushes
http://bruisedxheart.org/brush
are a coupe I have brushes from.

http://www.websoup.org/resources/links.php?cat=33
http://realmofcreations.com/psp7brushes.html
http://www.clickitgirl.net/lushb/