No, I want a system based around both people and topics/interests. As I mentioned above, I don't want to hear about Lisp from some random folks I don't know, I want to read about it from Peter Norvig and other experts. Need to be able to cross-reference both people/posters (Circles) and topics (hashtag filtering or whatever).

I can actually get the pure topics/interest stuff from subreddits like /r/haskell and speciality sites like lamda-the-ultimate.org.