I totally agree with Gollum(?). The average intro is supposed to be like 17-20 seconds max, so I've heard from some studio guys... But I wouldn't say it's too short, it was like 3:30 right? That's about the norm (not that that's good or bad), but it's easier for radio play that way.
I really hope you're not just feeling beat down, I know I'm just trying to help out and that's what Gollum(?) said too.
Seriously though, what do you mean going nationally? Are you gonna slap it on your myspace and call that national? I'm really confused.
Gollum(?), what do you do as a musician?