Twibes is some new twitter-related website which manages topic-related groups of people and collects tweets based on up to three tags.
Since apparently nobody did so far, I set up a twibe on machine learning. Follow the link and click on "Join" on the right and side to join.
Currently, the group is picking up tweets with either "machine learning", "#machlearn", or "#machine-learning" in them. Anyone got an idea how to improve the tags?