Since OpenID is coming up a lot in this thread, I've been meaning to set up my own personal OpenID provider on my colo box for a couple of years now, but every

Since OpenID is coming up a lot in this thread, I've been meaning to set up my own personal OpenID provider on my colo box for a couple of years now, but every time I look around for a free software implementation that supports SSL client certificate authentication, I'm stymied. Does anyone know of one?