MilesBuzz! - Website for Point/Mile/Currency Conversion Rates

Is there a website that maintains a list of the conversion rates between airline programs, hotel programs, and relative value in currency?

I am trying to figure out the math and/or relative value of Delta Miles, Mariott Points, and Starwood points relative to each other.

I am looking for something/anything similar to Foreign Exchange quotes or such.

http://www.webflyer.com/programs/mileage_converter/

good luck and happy flying!