Google Alerts is a very useful site which a lot of webmasters use to track references to their websites, products or themselves. TweetBeep is the Twitter equivalent.
It emails you with hourly or daily updates with any reference to a specific keyword you are tracking. You can make your keyword alert as general or as specific as you want. You can choose whether a specific person references a keyword, whether there is a link included and even exclude alerts if a certain keyword is included in the tweet.
It’s a great service for tracking a product or website you are running and one which I’m sure a lot of you will find useful 
Link : TweetBeep
Just what I was looking for. Cool tool.