Great Post, I totally agree especially on that list concept. I’m working on a process where you can create lists for different interest topics that you want to track on Twitter and then we analyze the people you follow and categorize them into the interest lists that are relevant to the topics by analyzing their tweets. And the best part about it is that we’ll do all the work for you and also maintain the lists as you follow more people and as you unfollow poor users. Just choose you interest topic lists and we’ll take care of the rest. my site is www.qweboo.com and we should be launching this feature in the next few weeks.,.