Whether you're a fan of Twitter's new list feature or not, it has proven to be a great way to discover people of interest one can mass-follow. But keeping track of Twitter lists can prove cumbersome and overwhelming.
Recently, Listiti launched, combining the concept of Google Alerts with Twitter Lists by sending out e-mail notifications based on the appearance of keywords in tweets from lists you keep track of. This is particularly useful for marketers who'd like to keep track of conversations about a company, product or brand, but only from a specific subset of Twitter users.
Listiti just pushed a new version of the service live, and has added a useful new feature that makes it even more worth checking out: badges.