A friend emailed me a very good question: ... what states can you write in Ron Paul?

Here is a chart on states' write in rules (disclaimer: not sure this is 100%, please check your own state's rules)
http://mfoster.com/misc/write-in_rules_2008.html

This blogger i read often says writing in does not make a statement or an impact that is measurable, because most states won't even report the write ins.
http://libertymaven.com/2008/05/31/ron-paul-write-in-options-rules-for-e...

Ron Paul asks a state department wonk if he ever considers that the billions we send overseas could help our own citizens at home.
No, he says.
Let's send billions to Georgia to protect a pipeline.