One of my favorite emails was from a man who said to me "Why do all the good ones live so far away." We bantered back and forth for quite awhile very easily even though we both knew there was no chance of a relationship. Perhaps it was so easy BECAUSE there was no chance of a relationship!
Happened to me once before also. With a forumite. Thought I was 'safe' at 3,000 miles. Nope. We ended up meeting face-to-face about 5 days after that first email. Lasted a couple years. He gave good email ;-)
I've heard the words NO chance spoken before only to find out they were wrong. I'll go along with little chance though
ha ha *insert non-existent knee-slapping emoticon here