Like many web 2.0 applications I initially found it lots of fun and very cool, but at the same time utterly useless. In fact the main thing I liked about twitter is that it seemed to take the CNN constant news and the constant personal knowledge collection (like CCTV) to a ridiculous extreme. Coming to answer your question I then wondered what can one do with this type of very personal news.
I then opened your yedda-twitter page to find the answer – you get a peek at someone's activities, you get to follow that person from above. It's nice but it also gives a bit of a big brother's watching feeling, which security by obscurity can only partly cancel.
So in short what I'd like to have is:
1) Be able to see the twitter-yedda page of any person that allows this from that person's Yedda profile
2) Be able to configure the authorization of my twitter-yedda activity, e.g. set it as opened to all, only to my contacts in yedda or to my contacts in other social networks or to a specific list.
I imagine that the second one is probably problematic to implement because it requires twitter's implementation rather then yours, but I thought I'd put it there anyway (after all you can ask them to add it and maybe they'll consent).