Romney suspended his candidacy, meaning he keeps his delegates. I think most likely he's thinking if there's a brokered convention they may be able to win the Presidency yet.
How could Ron Paul possibly run for third party at this point? He is a man of his word, and I have heard him, in person, say he will not run third party. Period.
I've never met the man in person, but I've seen him on TV time and time again saying that he has no intention of running 3rd party or independent, but that he is not ruling it out.
When and where did you hear him in person say something to the contrary?