Michael
I can not convinced that such many users forget their username or password while they were able before to use those credentials to key in many facilities, then later on they found they are not able to log in, please work on open ID, there should an issue on it, users with yahoo ID tried these steps on your document but still they failed, you find faint reset link but for gmail it work.
See attachment
Scott I gave you list of users failed to log in HFR but no feedback till now.
Regards
Yahoo
Gmail