mmmm this is a grey area for me as a user never bothered with openid and a likes many systems will link in to third part sites such as facebook, twitter, google and so on - so I just had a search around and theirs shit loads all fighting for their share and many using openid and their own and so on..........
So I was looking at what I could and should support on shared id's such as openid but from I have seen its a flocking cat fight and no one winning not even google or Facebook..............
So the bottom line is from I have seen their is no clear winner for this and all these look like flops heres another one http://en.wikipedia.org/wiki/RADIUS never heard of it but there are many
But as a user yeh it sucks site after site register login and bloody passwords......So as a site admin wanted to provide a better service but I just cant see a trend on this of anyone using these services its all low scale so if on AAAA I supported one I dont expect it would get used and if a provided the top 10 still dont see this kind of thing been used yet as a user I think it is needed but the web full of it and none a success
So just wanted to do a quick poll to see if anyone was using or keen or the same is me as no clear winner and all will fail but we all want it if secure and easy and widely available