Moderation,reposting to Twitter, and linking are interesting ideas -- I hope you don't mind if I take them as suggestions and potentially implement them down the road.
What language/framework did you use to build tweviews?
I haven't got much time to work on Tweviews at the moment - I did it as a little diversionary side-project-burst-of-creation thing. My main focus at the moment is my start-up.
I also used Ruby/Rails. I find projects like this to be both ideally suited to, and hampered by, the use of RoR. They're nice and quick to code, but setting up the hosting environment is a time-consuming bore.
What language/framework did you use to build tweviews?