Hey, I'll throw my hat in here too. I've always wanted to try my hand at some voice-acting, though I've never done any. Keep in mind, I doubt I'm very good, but if you need someone for some short lines, I'll give it a shot.
I have an American Midwestern accent with a touch of a southern drawl.
Also, I'm experimenting with some voice-mod software, so if you have any alien voices needed, I might be able to help there, too. I know most everyone in the B5 universe sound human
I don't frequent these forums very often, so either use PM or email to get me. If you just post or something, I likely won't see it for a couple weeks at least.