Indeed, Black Talon and The Foundry are the only two I've encountered so far with some dialogue though I can't say I had the impression the choices you make in The Foundry have any effect on how it plays out. Hope I'm wrong though.
A lot of them also are a tad too similar to each other surroundings wise. The only one that sorta impressed me architecturally was Athiss, really has this KotOR feel about it which was awesome. The Foundry was a big letdown in that respect,