There are a few tables that I have bookmarked just because I have fun looking at how various people value miles:

http://www.plasticiq.com/blog/freque...on-comparison/
http://www.insideflyer.com/articles/...e.php?key=6358
http://www.frugaltravelguy.com/2008/...el-points.html

I don't necessarily put much stock in those values though because none are centered around my travel goals, etc. I would never base a decision to use my miles or not on what other people's preferences are.