@Mike – yes, still a jump, but the important factor is that it’s a jump back to the site that *you the user* have chosen as your provider. In a way it’s sending you home, at the very least not somewhere strange and foreign to you.

Consider if Facebook starting acting as an OpenID provider (which would be easy for them to do). All those people who spend most of their work day on Facebook would be able to key in their Facebook OpenID into any number of sites, get bounced to an extremely familiar page (which they’re already logged into already), click Allow and they’re through. To me that sounds like a fairly painless and simple process.

The ‘jump’ is only a problem if you’re jumped to somewhere unexpected.