Specifically: All posts to @user_b from @user_a tagged 'example' I initially tried this: http://search.twitter.com/search.atom?q=&tag=example&lang=en&from=user_a&to=user_b
But since twitter apparently applies some arbitrary "quality" filter on that, it somehow decides to not include some things. [http:// code.google.com/p/twitter-api/issues/detail?id=1042]
