Just launched
http://www.CoinCadence.com a Bitcoin to USD exchange index currently including 6 exchanges: Bitfinex, BTC-e, Bitstamp, CampBX, CoinBase and Kracken in the index price.
Would love some feedback on:
1. What you like about the index
2. What you don't like about the index
3. How you would improve the index
Please keep in mind this is a site under development. Things may, and most likely will, change rapidly.
I hope you enjoy it.
Thanks