It's an ad supported freeware app (you can configure your install to omit the toolbar) which creates a virtual private network and hides your IP address, which enables people like me who live outside of the US to watch Hulu and other blocked US content, which is why I'm thinking of installing this.

Download is here:

http://anchorfree.com/downloads/hotspot-shield/

Haven't found a ton of reviews on it and am concerned that it might cause problems with connecting to poker rooms. Thoughts? Experience?