Here are some other TWERPS resources I've found. 

 Personal Web Pages

Pineapple Leader's TWERPS page
  TWERPS Station

Necrotech's Universe of TWERPS    

Evil Schemer (page has a couple of supplements)

The EV-WEB

BIOROID WARRIORS

Yahoo's TWERPS group
  QUATERNARY: a TWERPS adventure setting

Noble Knight Games
crazy egor's (ebay store)


I plan to add to the site as I find more stuff. If you want me to add anything, just email me a link.