Writing him here in New York is a waste as well. He needs to be an official write-in candidate. And they throw out all of the write-ins anyway because of all the people who vote for Mickey Mouse, Hitler, Elvis, etc. :p
I think it would happen, but if Romney's the incumbent going into 2016 then nobody will run against him for the Republican Nomination.
EDIT: And by nobody, I mean the people listed in that PPP Poll.
I know it's a long while away, but I figured I'd share it.
It was out of a field of 9 hypothetical candidates.
From their Twitter:
https://twitter.com/ppppolls/status/225720225683877888
Palin comes in last out of the 9:
https://twitter.com/ppppolls/status/225720393858682880