I've been down this road. Amazing and beautiful things are possible, but you can't just collect pictures and tell your local concrete guy to "do this...".
They're artists.

You need to talk to the artists, look at their portfolios and see what they have done and what they think they can do for you.
Here is a good book that has a nice mix of pretty pictures, inspiration and actual technique;
http://www.amazon.com/Concrete-at-Home-Fu-Tung-Cheng/dp/156158682X