Might as well, ask this here. What programs would you recommend for recording a commentary with someone online? Besides Ventrillo and there mean "we're a company looking for profit" cost?
I say record separately and then combine the tracks into one (very, very simple process). It would be a million times cleaner that way. If you really need to hear the other person, I'd recommend just being on the phone with them (but make sure your mic doesn't pick up the phone). Or try using Skype (or if you have a Mac, iChat) and use headphones so that the mic doesn't pick the other person up.
On a personal note, I wanna put outtakes in our zip file (I guess technically, it'd be replacing) but it looks like I can only select one mp3 per zip. Am I even doing this right? How do I add an extra mp3 to peoples' purchases?