Site of our small VR research team:
http://3dvrm.com/
Blog of very talented VR engineer, and my friend Sebastien Kuntz.
Here you will find endless amount of useful info about VR:
http://cb.nowan.net/blog/
Amazing place on the net, with lots of information about old-school Virtual Reality.
Many interesting articles, reviews (some of them made by myself), tear-downs, real documents, and shop with various old-school VR devices. Cheers to Tony!
http://www.vrtifacts.com/
Homepage of talented guy – Kevin Mellot, with very nice reviews on VR devices:
http://mellottsvrpage.com/
VR Geeks association, articles will help you to make your own VR setup at home:
http://www.vrgeeks.org/