Allen is my favorite candidate at the moment as well. I think Romney's extensive business experience would make him a fine VP pick though.
Because of the "Mormon Issue" Romney will never get his parties nomination in 2008. Just the sample of anti-Mormon sentiment shown in this thread should be enough to let any demographically minded analyst see that he cannot win the Southern (evangelical)primaries. Romney could be president but only after 8 years of Vice Presidency immunizes him from the anti-Mormon whisper campaign.
As for the role of religious bigotry in politics- I think too many people point to Lieberman's candidacy as a sign that minority religion does not hurt you any more. But ask yourselves, in the state of Florida in 2000 were there 200 Democrat voters who could not bring themselves to vote for a Jewish candidate? Considering how strong anti-Semitic though is in some African American and Arab American communities that otherwise would have supported Gore can we be sure that Lieberman did not cost Gore Florida? Some of those same evangelicals who decry the evils of Mormons also still refer to Catholics as "Papists" We live in a tolerant country where a Mormon can be governor of Michigan or Massachusetts, and a Jew can be governor of Utah, but that does not mean that close races are not still swayed by bigotry.