Count me among those affected by this issue. I'm able to connect my self-hosted blog (www.timmitchell.net) to my WordPress.com account and it appears that everything is working up to that point. However, when I try to add this to my Klout profile, I'm redirected to my blog with the message that Klout needs access to my site. When I sign in to my site, I'm then directed to my dashboard, but Klout is still not able to connect. For what it's worth, I do find some Jetpack-related bits in the query string:
/?jetpack-code=NgU1q....
So Jetpack is *trying* to do something on my site, but for whatever reason the operation does not complete. Help!