Legal opposition is not only imposed on online casinos, but that applies for mobile games also in the US. So, until a bill is passed at the Federal level permitting Americans to play casino games from their mobile phone, you have to continue with your regular US players permitted gaming sites.
The major mobile gaming provider is Microgaming. They are working to convert almost all of their casino games in to a format that is playable in the iphones platform. They are venturing out to niche the mobile gambling sphere; however, they have restricted US players from being able to play in mobile casino games. This is because they are not ready to breech US laws and to get in to government related troubles.
Once the US legislation clarifies the permission for Americans to play in online casinos, they are going to accept American players. It is seen that none of the online gaming companies which provide with live casino games and mobile games are accepting US players. For now, the US citizens got to be satisfied with playing in sites that accept bets from them.
The mobile gambling experience is not in anyway less interesting than its online counterpart. All the features of a live casino like the 3D animated gaming atmosphere with excellent graphics and sound features are available in mobile gaming.