A page on additions and corrections to Douglas Richardson's Plantagenet Ancestry:

http://freepages.genealogy.rootsweb.ancestry.com/~wjhonson/PAC/

This page probably won't be current for long since Richardson will be releasing an updated edition sometime soon (don't know exactly when though).

By the way, sorry for the long hiatus. My grandmother passed away in February and I haven't really posted since then. Hopefully, I'll be able to contribute more from now on.