OR...

If you want a program that is better than "Twitter Karma" try TweetSpinner. It can do the exact same thing as Twitter Karma and a lot more. The only drawback to TweetSpinner is that you can only link one account unless if you subscribe to their paid service which will allow you to link up to 5 accounts for $15 a month.
Overall if you have one account TweetSpinner is the best option but if you have more than one account Twitter Karma is the way to go.