Is there some website that aggregates all the Bitcoin exchange prices so small businesses can find out the current market rate and react accordingly? I have a small business in doing repairs and I'm willing to take bitcoin, but i was wondering if there is a site that aggregates all the bitcoin exchange prices so I can get an idea of what price to charge in bitcoins to avoid the day to day volatility. Yes i know i can use bitpay, but I want to be able to just take bitcoin myself and come up with my own merchant rate that i choose and feel comfortable with.
bitcoincharts.com is one of the more popular ones:

http://bitcoincharts.com/