I'm aware of a few visual novels like Phantom, an Ai Yori Aoshi dating sim and even Steins Gate getting releases here in the states. Otherwise as noted, the games aren't really as popular here in America as they would be in Japan.
EDIT: After having a look around, looks like Rightstuf has a small offering of visual novel games. However, most of them appear to be eroge games, one that notably stuck out for me being School Days. Wasn't even aware the game was licensed. The more you know! XD