Red Velvet Mite - Trombidiidae (Allothrombium?)
I realize this photo may not be a huge hit with you guys, and it's definitely not my usual fare - but I the photostream needed a non-salticid upload as I haven't posted anything but jumpers since July! A fascinating animal regardless of the quality of the photo.

I really don't know too much about these little guys (this one was around 3mm - pretty large for a mite!) but I'm guessing he/she may be from the genus Allothrombium (tell me if you have any ideas on a better genus or if you actually know the species!). I've read that they can be quite ferocious little predators, feeding on several different arthropods - including other velvet mites - though cannibalism doesn't appear to be too uncommon in the arachnid world. To read more about the family, here is a great paper on Trombidiid mites.

The photo is a crop from a single photo taken last May, and I actually don't remember which lens I used or what magnification the photo was taken at. I'm going to guess it was the 50mm reversed on extension tubes...