Romney has repeatedly said he is not running, has no plans to run, and no interest in running. Sure - Chris Christie has said that as well, but at least the thought of Romney running doesn't make you collapse laughing.
I do want Romney on the team. He's smart, a fundraiser that puts the Clinton machine in the shade, organized, overall a decent enough guy but ruthless if needed, has years of actual real world experience and knows his way around politics. If Cruz, or Perry, or Barbour don't grab him to head up their campaign for '16, they are idiots.