650B wheeled bicycles :

650B wheeled bicycles

Builders

Rivendell - A builder of fine bicycles including the 650B wheeled Saluki and upcoming Glorius and Willbury mixtes.
Bicycle Specialties - Builder of amazingly nice Mariposa bicycles.

Organizations

Confrérie des 650 - A group based in France working to keep 650B alive. There used to be some English language content available but with the switch to the new website it has, at least for the moment, fallen by the wayside.

Publications

Vintage Bicycle Quarterly - A bicycle publication that focuses on classic bicycles and randonneuring.

Personal websites

A 650B Alex Singer - Website dedicated to the owners 650B Alex Singer and with links to other Singers on the web.

General bicycle related information

Shelodon Brown's website - An amazing collection of information about bicycles.
Sheldon now has up a web page regarding 650B conversions of road bikes.
How to fit a bicycle - Peter White's article on how to arrive at a proper fit for you - not someone else, you.