At this point, uncertainties surrounding the music licensing used for LLtP mean that I don't feel confident that a Steam release would be a good idea. Unless things change, please don't hold out hope for a Steam version of this game.
On the other hand, I'm developing Supermodel with an eventual Steam release in mind. One of the things I hope (emphasis on hope) to do there is to compose most, if not all, of the soundtrack myself. That should solve any such problems.
In other news, achievements are finally happening in LLtP! These are going to be a lot of fun, especially since I use many of them to deliver additional punchlines to existing stories.