I was out riding a while ago when I saw a guy on a polished Litespeed. He had this mirror on the end of his road handlebar that was really cool. I still don't know who makes it, but I found that it seems to be pretty regulaly posted up on ebay. I was able to find it by searching for Italian bicycle mirror.
I bought one and have been using it for about a month and a half now, and now I wouldn't ride without it.
I think its a small company that sells it, so I thought I'd give them a "Shameless Promotion". Plus, it really is of benefit for road cyclists, especially the kind who are really picky about what they put on their bike, like me!