De har lavet en brugerundersøgelse som viser at der er en del usability issues (surprise!) for almindelige brugere omkring OpenID:
http://developer.yahoo.net/blog/archives/2008/10/open_id_research.html
On the RP side of things, our recommendation is that they emphasize to users that they can sign in with an existing account, specifically their YahooID. We believe that the YahooID, as well has IDs from other providers, have a higher brand awareness than OpenID. We also believe that first time users signing in with an OpenID should be able to go directly to their intended destination after signing in, instead of having to complete additional registration. Hopefully, as SimpleReg/AttributeExchange are more widely supported (Yahoo does not currently support them), relying parties will no longer feel the need to force the user through an additional registration form after signing in with an OpenID.
Her bekræfter de for øvrigt også, at Yahoo endnu ikke understøtter SREG, hvilket jeg spottede forleden. Det er sgu ret åndssvagt, idet brugeren så bliver "tvunget" til at manuelt afgive informationer (fx email) på sitet (RP), og hvad er finten så i at "registrere" sig med et OpenID?