There is a local grocery chain around the Phoenix/Scottsdale area called Aj's that does a great iced coffee concentrate. The large is a 32 oz cup and the cost is about $3.00. Not bad, but still not worth the inconvenience of stopping every morning for one and more or less blowing $15 bucks into the wind.
I was talking with my former office mate about how much I adored iced coffee but didn't want to spend the money on buying it all the time. My office mate was what I referred to as Kyle-i-pedia -if he didn't know the answer he'd find it in seconds, usually with statistical data that he had stored long ago with the purpose of knowing one day he would need it as backup for another not yet known fact.
Kyle told me about a bunch of different cold brew systems but said that I would be able to make it at home pretty easily. I tried his suggestions.