Foundation for Medieval Genealogy...

Our main objectives are: to promote rigorous scholarship in the field of medieval genealogical, prosopographical, and related research; to collect, catalogue, translate and analyse relevant primary and secondary sources; to undertake research projects, or to support such projects by financial or other means; and to disseminate information resulting from our activities by electronic or conventional means. ...
http://www.fmg.ac

Some notes on medieval English genealogy...

Resources for medieval English genealogy, including a guide to sources, and links to source material and family histories on the Internet...
http://medievalgenealogy.org.uk

Stewart Baldwin's Genealogy Page...

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http://sbaldw.home.mindspring.com