Mr, Tweet, a service that recommends people to follow on twitter based both on who follows you and on mapping your own social network and twitter connections, launched a few months ago as a bit of a lovely one trick pony. The brainchild of Ming Yeow Ng and Yu-Shan Fung, with assist from Stanford Professor Andreas Weigend, Mr. Tweet started quickly adding features based on user response.

Now, 4 months from launch, Mr, Tweet has 76,000+ followers and a hockeystick growth curve on twittercounter, adding 800-1,000 new users a day.

I've become a big Mr. Tweet fan, so it's great to see this leap--one of the reasons I like the product and continue to use it is that they are responsive to customer feedback, so it keeps getting better, which, in turn, keeps my interest.