My latest sign up is to what looks like a cool idea – Get satisfaction
Pretty cool way of doing searches within Twitters discovered by Scoble:-
Scobleizer Very nice Twitter search: http://terraminds.com/twitter/
I like the way it searches for alternatives around the chosen word. Here is a search for emanating:-
As you can see it has automatically extended the search to emanated, eman, emanate, emanations, emanator which is pretty good.