Hi Patrick, glad you like it! Good question, that would indeed be better, for you as well as for us: Fewer accounts, no additional sign up required, and we would be able to link Talk with Jake and be of better service to you.
Sadly, the forum that we're using (Discourse) makes us choose. If we'd choose for the Jake Account sign up, that would be the only way to sign up. We want Talk to be as open as possible, so that just wouldn't do.
@Miika's workaround is pretty nifty though.