Credit. I used a lot of stuff for this and a more complete and well-researched credit list will appear soon. But for the moment.

Brush Links {psp&photoshop}
1greeneye.net: This is the most amazing site ever. Great brushes and, they come in both photoshop AND paint shop pro formats. And to that I say, ROCK ON.
h8machine @ devArt. Amazing.
iccaroo @ devArt. Also amazing.
free brushes
brush|fed
echoica.net
hybrid genesis
brush find
500ml brushes
inobscuro brushes

Texture Links
dholms @ devArt
labirynth @ devArt
thespook @ devArt

devArt is a really great place to find nice textures and brushes.