Hi there Lopaka, welcome aboard.
Very true, Lieberman doesn't stand a chance. A Lieberman ticket would be Mondale '84 all over again, and most Democrats realise that.
Edwards looks more like a potential VP nominee. Way too inexperienced to run for President. Plus he has that slimey lawyer exterior which is bound to turn off a lot of voters. (No offence to any lawyers present here intended, of course...).
Clark is definitely a pretender, simply a last-gasp attempt by the Clintonite wing of the party to find a halfway credible "Stop Dean"-candidate.