Fluther, my favorite Q&A site has launched a new feature Wednesday called "Your Fluther." It lets you follow other people's activity on the site in one centralized, easy to parse feed. It's a companion to the built-in recommendation engine "just for you" that will feed you with questions based on topics listed in your profile and tracked site usage. More importantly, it's an easy way to create a private group of users who you'd rather keep an eye on than the growing public feed.
One thing I'd like to see added to that feed is users' responses to other people's questions as many of the site's best users seem to do more answering than asking. It would also be another good way to discover new worthwhile questions besides the centralized feed.
Fluther co-founder and CEO Ben Finkel tells me the site has been doubling in users every three months, which has been helped with a successful iPhone Web app and an overall increase in traffic from search engines. While Fluther has less users than more established services like wiki.answers.com and Yahoo Answers, I think it's got a far more advanced offering with things like live tracking of written answers and a count of how many people are watching. There's honestly nothing as cool as asking a question and seeing who is in the middle of responding before their post goes live.