I sway to the left and I want this man in the white house. I think that if he won the primary (which in all likely hood he won't) that he could give Obama a run for his money if he campaigned right. Without getting into what his views are, its clearly apparent that he's gotten the attention of many liberals, and I think that a high percentage of 'modernist' (usually left leaning) and liberals would vote for him.
In my opinion, if Romney wins the primary, it's going to be Obama for the next 4 years, no questions asked. The fact that he's a Mormon will (and already is) hurt his campaign in some way or another. It'd be interesting to see how plays out though, when you'd have Obama, who people think is a Muslim, and a Mormon running for president. However, I'd be willing to bet he'd take Utah.
This is all my 2 cents...Gingrich may very well be running for president.