Basic skeletal intro to Xaraya concepts

I'm new to Xaraya and have been looking at it for a few days now. 
Trouble is that I'm not getting very far. It sounds really cool and the 
answer to do all the things which I want to do. But after going through 
the documentation I still don't know how to do it. There is one very 
basic fundamental thing missing.

What about a basic overview of how Xaraya works? The guide does not have 
   one. And if it does have one, then take it from me that a beginer 
can't find it. The docs look great, but they are over my head. I think 
that if I had an explanation of how the pieces fit together then I could 
struggle through it to the point of having things make sense.

The interview with John Cox actually explained more about the basic 
working of Xaraya than the guide did. I think the guide would make a lot 
more sense if there is a 1 or 2 paragraph explanation of what the 
different parts are and how they fit toghether. Having to read 150K of 
text about every module to try and gleam information on how it works is 
probably like reading my message here which should simply state :

Is there a basic explanation of what the parts in Xaraya are and how 
they work together?

SpiritTech

PS Just in case my tone is not clear. The program looks great, I just 
can't figure out how to use it though...  please help me :-)