Personal web sites:

Simen´s Lego page: it has a scanner design (the first expert contest winner) and a proximity detector among other things...

Directional Transmission : it contains pictures and explaination about a directional transmission that allows you to make two movements with only one motor (really cool)

Technica Registry: A register of Lego Technic parts! It has pictures, descriptions and serial numbers...

Jin Sato: This site is in japanese, but you may look at the incredible inventions; there are some videos of two and six legged ambulators.

Joe´s Mindstorms Gallery: other japanese page; it seems that they know what they are doing...

Mindstorms RCX sensor input page: this site has lots of info on the official sensors and how to make your own homebrew sensors...

Robs Robot Page

Artificial Intelligence and Machine Learning > More Outputs: Several kind of transmissions. 

Guide to Lego Clocks: Different designs of Lego-made clocks

Killough's Mobile Robot Platform: This page contains a video of a Killough´s platform (omni-directional-rotational traction device)

Small Killough Platform built with Lego: This page contains instructions to build a really small Killough's platform

RCX and Palm: Info on controlling the RCX with your Palm

Lego On My Mind: Very interesting site with many ideas and thoughts


Webrings and "official" web sites:

    Lego Mindstorms official web site

    Lego Mindstorm´s Webring 

   Lego Webring (general stuff)


    LDraw and similar progs´s Webring 

         Lugnet News: newsgroup about Lego

  BrickShelf: Catalogs and scanned manuals