There is some sort of electrostimulation treatment for bites. It isnt exactly a main stream treatment (Nothing seems to work) but I have seen a lot of people swear by it. (Essentially tazer the bite)
WARNING - disgusting pics.
http://www.lib.uiowa.edu/hardin/md/brownrecluse.html
http://www.highway60.com/mark/brs/linda_bite.htm
Thanks for sharing those wonderfully disgusting photos.