I ♥ Listerine! As many of you know Twitter added a lists feature which has been helpful in crowd-sourcing the stream. This feature set has prompted developers to begin augmenting the lists feature with new applications that take it a step further. The creators of Webapp Listerine make adding contracts to your lists easier.
Listerine allows you to drag and drop or double click your contacts into a list. Its a fantastic new tool.
Clean up your feed: http://listerine.syndeolabs.com