STL files:

http://www.thingiverse.com/microrax

ARTICLES:

2009-08-14  CNN Money article about the Space Elevator Games, the origin of MicroRAX:

Space elevator chase yields Earthly rewards

MAKE visits MicroRAX HQ

Makezine 

Link to Space Elevator Games:

www.spaceelevatorgames.org/

Blogs who have mentioned or reviewed MicroRAX:

http://sites.google.com/site/teamtobor/microrax

http://www.lynxmotion.net/viewtopic.php?f=11&t=5699

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/

Gear Diary 

Hacked Gadgets

Mounting a servo

http://desnotesdev.blogspot.com/2009/10/preview-to-come.htm

MircroRAX Micro Review

Open Source Journeyman