same here -- well, not exactly the same; when i click the "add new account" button, it tells me "You have successfully saved your account settings." but it does indeed not do anything else.

going to http://www.dreamwidth.org/manage/externalaccount.bml works.

ETA: and the actual crossposting to LJ did work fine. i got no notification (which it said it would give me). the html looks a little different, and i will test a few things hereafter to see what happens) -- great job for an alpha release! thanks!