The soandso.livejournal.com is for OpenID users; OpenID is sort of like a passport that LJ users can use in order to sign in to DW, so they can read locked entries when someone's granted access to them by their OpenID, comment, and get notifications. They can get email notifications if they've set up and confirmed an email address.
no subject
Date: 2011-12-26 05:39 am (UTC)You can set up feeds for people's public entries on LJ for your reading page, but that is separate. (Those are set up on http://www.dreamwidth.org/feeds/ and you enter http://soandso.livejournal.com/data/rss in the place where it says "Feed URL" to start.)
Getting rid of the tags: the option should be in http://www.dreamwidth.org/customize/options?group=modules somewhere.