Connecting many microcontrollers to each other

As you could easily gather from my profile and this question, I am a newbie. I am using an arduino UNO R3 and multiple separate microprocessors. I would like for them to be able to interconnect, and it is preferred that a central Arduino can read all the data. I am wondering if this url* is on the right track. in summary, what interested me most was the 125 channels it claims to be able to connect to. the only problem I have with using this is the channel that we are tuned to may have other connections and therefore messing up the information sent.

* the URL is :