Some useful links:
Damon Rinard's Bicycle Tech Site - http://www.sheldonbrown.com/rinard/
Bicycle Tech Links - http://www.damonrinard.com/
Frameforum - http://www.frameforum.org/
Weight Weenies - http://www.weightweenies.starbike.com/
The Bicycle Forest - http://www.bikeforest.com - BikeCAD, Homebuilders' Gallery
Patents and the History of Bicycle Technology - http://patentpending.blogs.com
Bicycle Design - http://bicycledesign.blogspot.com/
Bicycle History - http://www.jimlangley.net
Shane Slater's home-made carbon singlespeed - http://www.bikemagic.com
Tuning-Test - http://www.tuning-test.cz - Suspension tuning
Pierre Lourdin's home-made carbon mtb frames - http://pierre.lourdin.free.fr
Cozy Beehive - http://cozybeehive.blogspot.com/
Slovak bike links:
Bike Baca Bicycle Tours - http://www.bikebaca.webs.com
MTBiker - http://www.mtbiker.sk
Bikemagazin - http://www.bikemagazin.sk
Carbonmike's home-made carbon full suspension frame - http://www.carbonmike.sk
Links related to composites:
All about composite materials - http://composite.miningco.com
Guide to composites - http://www.netcomposites.com
Werksberg Composite Forum - http://www.compositeforum.werksberg.com