The individual features offered aren't anything new. Google Voice has had similar features for screening or blocking calls, as well as sorting callers into groups so that they can, depending on their group, be connected through, sent to one of several voice mail options, or blocked. StarStar Me adapts this for the average consumer. Obvious applications of the feature include dating, job hunting, and really any situation where having an appearance of knowing what you are doing is important.
StarStar Me is a service delivered by the Zoove corporation. As such, all StarStar type numbers are provided through them, in the United States. Eventually, other carriers than Sprint should have this feature. The fee for Sprint users is 2.99/month per StarStar number they sign up for. Prices for other carriers have not been formally announced at this time.