The poster on the below link shows all the communication satellites around the world. I found this to be quite helpful for trying to find satellites with my dish positioner. For example it shows that there are not many satellites over the pacific.
I took this file on a disk to my local print shop (Kinkos) and they printed it out on 11 by 14 (color). You can read all the names on the 11 by 14 size. Looks nifty!
Commercial Communication Satellites...
http://www.boeing.com/defense-space/...980031_001.pdf