This is just more evidence of the establishment republicans trying to push "their" top two. For a short while it was Romney and Perry, and then given what little Perry brings to the table they've decided to make it Romney and Cain; which is basically Romney and Romney, which is exactly what they want. Cain endorsed Romney in 2008 and will do it again in 2012 without a doubt.
The powers that be have been looking for anyway to make Romney stronger than he truly is and so they needed a Romney 2.0 in Cain to help bring the south around. Who better than a minister-cancer survivor-from Georgia to make Romney look like southerner? The bad news for the establishment is that even with Cain's blessing, Romney will not turnout the southern voters. It comes down to the surest way the GOP can solidify a victory against Obama in 2012 is through Ron Paul. Of course that would mean doing the right thing for American citizens and not the bankers, so no chance of that happening; which is why they need to create a hybrid candidate out of so called "businessmen" like Romney and Cain and just try to avoid the issues of experience, flip-flopping, trust, etc.
Think of how easy it would be to beat Obama if the GOP all pushed Ron Paul; a candidate of great experience, an honest record, and a different direction (aka: REAL change). Ron Paul is the anti-Obama that they need to win.