Usability 
Download free ad-supported Java games. Similar to GameJump (review) it has many of the same games. Download is via the WAP site, direct to your PC for side-loading or sent as a link in an SMS. HOVR differentiates itself from GameJump by having more of a social element. Members each get a personal page called Mobile Space, where the games you've downloaded and your high scores are displayed. Your can set up a detailed Mobile Space profile with your picture and exchange messages with other Hovr users. In spite of the name, Mobile Spaces are not available in a mobile version, only as a full PC site. Full registration requires giving up a mobile number but you can use a phony one if you're the cautious type like me.