As far as I know, Ron Paul has refused to abandon the Republican Party and he can't run on their ticket and on an Independent ticket at the same time. therefore, we can't write in a vote for him because he's locked in. In addition to that, he's running for his seat in Congress in TX at the same time so how do you think that will play out?
He shot himself in the foot being stubborn if you ask me. Not to mention that he wouldn't live long enough to serve out one term under that pressure and that he sounds like a kook when interviewed. I can't see myself voting for him even if he could suddenly overcome all those obstacles, which isn't likely.