http://weissundblau.blogspot.com
This blog is dedicated to the acquisition, restoration and preservation of antique and vintage BMW motorcycles, with an emphasis on sport and racing machines.
http://www.bmwr65.org
A friendly and helpful forum and Wiki for all R45 and R65 models from 1978-1987.
http://dmoz.org/Recreation/Motorcycles/Makes_and_Models/BMW/
Links listing of interest to Vintage, /5, and other R-bike owners.
http://www.geocities.com/MotorCity/Lane/5750/bmwtoypage.html
A mind-boggling collection of toy BMW motorcycles.
http://www.motorcycle-videos.net/?page=1&tag=superbike
Motorcycle videos including vintage bikes.
http://www.classicmotorcycles.org.uk/bikemuseum/museum_bmw.htm
Photos and information about post-war BMWs.
http://members.tripod.com/coskys0/VintageMotorcycles/index.htm
Over 800 pictures of vintage motorcycles.
http://www.vintagebike.co.uk/index.htm
Large collection of pictures, videos, and sounds.
http://www.earlesfork.com
Great photos of bikes, parts, and original media.
http://www.classic-motorrad.de/galerie/
Many, many images of classic bikes. Try a search on BMW.
