Thanks.

BrowserID is well on our list (Personally I like its approach).

Added a vote for OpenId, and dedicated account.

Nothing wrong with an old fashioned dedicated account. I refuse to use my Facebook login for, well, basically anything that isn't Facebook.

+1 for google account, dedicated account, and live account, in that order of preference. Facebook just leaves a bad taste in my mouth.

I'll give a +1 on BrowserID, I think it should be used on as much new stuff as possible. I really love it.