Twi.gy is a URL shortner for Twitter that claims to also add you followers. There was not a single page of help reference on the site which always worries us.
You just register for the site, and by that I mean give them your Twitter username, password and email address. No oAuth or anything else. No samples, no views of other shortened URL’s. Nothing.
I did a Twitter search to see if that client type posted and did see people using it. It provides some basic stats of the number of clicks your URL received. But other than that no one I saw right away had any other good reference on using it. We will keep an eye on it.