I caught wind of this through another cycling listserv. It is especially useful if you are interested in mountain bike engineering or design stuff. Even if you can't understand much of the higher-level technical jargon (I can't) it is still interesting to see how the different suspensions perform using the "Linkage" program. If you are in the market for a new ride, you should definitely check it out! go to: www.mtbcomprador.com/pa/english/ Click on "I. Primary Concerns." Scroll down till you see a bunch of links called "Linkage" It is easy to use and install and it comes with a bunch of bikes in it already.