Here's what I've got:

 http://www.lynxmotion.com/index.htm (robot walker kits and such)

 http://www.ottawarobotics.org/paintball.html (a page discussing an
      (autonomous paintball robot competition) and
 http://ottawarobotics.org/splatbot/2001/westteam/ (videos of the above,
      but I can't get them to work)

 http://www.marksmark.net/  (check out the voluminous section on Bad
      Monkey Jr.)

 http://www.maxzilla2000.com/index.htm  (check out quagmire, a custom 6x6)

 http://www.mikesmonstertrucks.com/quarter_scale_rcmt.html (check out his
      parts links too)

 http://pub11.ezboard.com/frcmtnetworkmessageboardmtmutantmonster

 http://pub11.ezboard.com/frcmtnetworkmessageboardmt14scale
      (the boards for RC 'mutants' and 1/4 scale monster trucks -- the
       latter is where I found the lawnmower mod.  url for that thread
       is:
 http://pub11.ezboard.com/frcmtnetworkmessageboardmt14scale.showMessage?topicID=93.topic
       )

 http://www.public.iastate.edu/~freddyg/ (interesting tube frame in
        progress)

That's all for now!

repoman