I don't know much about either American Gods nor Firefly but that's cool since Barty doesn't know who your charries are anyway. I'd love to rp him against both of them. I hate to admit that so far the only thing I've read by Neil Gaiman is "Stardust" but that was brill so I should probably read more from him. He's very talented.
However I have been in rps which had a Laura Moon and a River so I'm a little bit familiar with those two ladies. Both should be fun for Barty to meet. If either would be out at night, feel free to bring one into Barty's intro post. It's not like anything's happening there which has to be locked between Valefar and Barty. And if not I'll certainly be posting once he's gone to find out where he lives and meet them a bit later.
Sorry I don't have AIM as it's eaten my comp and spit it out in the past so I don't like it. But I'm online pretty much every day so email (midnightheart@att.net) or IJ pms work for me.