This site has a bunch of hi-res textures, plus a bunch of fonts and a free Photoshop/Paint Shop Pro plug-in.

To download the textures, one first needs to become a site member. This is fast and free. Here is the URL...

AutoFX Textures

The free plug-in is for creating a mosaic. It works in Photoshop, Paint Shop Pro, etc and it works as a stand-alone program. Make sure to request the serial number on the download page. I first had to open the standalone version of the program and input the serial number before the plug-in would work. So, if an error pops up when using it in PS or PSP this is probably the reason.

Here is a simple picture on which I applied the plug-in. The pic is also the link to the plug-in. Also, the neatness slider in the plug-in provides a really neat effect. One which the standard mosaic plug-in's don't.