Articles and Links
STL files:
http://www.thingiverse.com/microrax
ARTICLES:
Robot Class uses MicroRAX and NXT
Blogs who have mentioned or reviewed MicroRAX
Here is a nice quick review that explains the kits quite well:
http://desnotesdev.blogspot.com/2009/11/microrax-construction-kits.html
http://www.contrapositivediary.com