Syndication and Import
Pull in my tweets into a custom stream (I can then annotate or expand upon) or auto-publish thoughts directly from thoughtstreams.io onto Twitter. Provide a nice link shortener. Truncate content when it won't fit in 140.
This will drive Twitter traffic onto your domain, and people may begin to see some utility.
Allow easy "re-tweeting" from the ThoughtStreams.io domain back to twitter for users who are not logged in.
You use case here is something like: Non-registered user sees tweet with ts.io short link, clicks through, sees more interesting content. Your priorities could be;