On this page you can do a little check of any keyword that you like. Just type your keyword into the search box below and within just a few seconds you will start seeing relevant tweets that are shouted as we speak. http://www.stickytter.com
I so love automation. That's a great way to see if people are even talking about your niche first off and then you can see what topic is the hottest. I already found a subniche...one I hadn't thought about. And it loads fast...I'm a sucker for a fast loading app!
Thanks man, I am really glad you enjoy it. The tool is great for promoting a service through twitter using your niche.