I feel as if I should have some comment about Gary Johnson winning the Libertarian Party presidential nomination over the weekend. As Conor Friedersdorf says in a brief history of LP presidential nominations, Johnson is easily the most conventionally qualified nominee they've ever had, beating Bob Barr and Ron Paul. I think it's also safe to say that Johnson would potentially have the most appeal to the libertarian-leaning left...which may not be an enormous group, but there are some.
Nonetheless, the former New Mexico governor doesn't, I don't think, seem poised to do significantly better than the typical LP candidate. He hasn't really demonstrated any ability to raise serious money, and he's really not at all well-known nationally. What that adds up to is that unless he's able to somehow generate some publicity, he's going to be in that same zone, under 1% of the vote, that the Libertarian candidate normally hangs out in.
The logical strategy for Johnson, then, is simple: gimmicks! If he actually can get some national attention, he's in better shape to turn it into votes than (say) Bob Barr was. Not that his upside is all that high, but I'd say it's higher than, say, 1%.
Basically, what Johnson wants to do is to monopolize any attention given to third-party candidates, and then some. Can he do that? I have no idea, but it's not an unrealistic goal; press attention is fairly random at that level, and you can be sure they'll be bored of Romney and Obama at several points over the next few months. Johnson didn't show any aptitude for that sort of thing in the Republican nomination contest, but if he or his staff can figure something out, I wouldn't rule out a strong (by historic LP standards) showing. Bring on the gimmicks!