Interesting so far, I'm about half way but I notice in the Crop circle segment they didn't mention this one- have you seen this? The story makes regular crop circles seem a bit boring...
Crabwood Formation
The Message of the Formation
is Clear — We Want to Talk!
The primary purpose of the Crabwood formation is to show us how to establish a two-way dialogue with an off-world race.
In order for us to initiate that two-way dialogue, we must first establish a common communication medium amongst other things...
http://www.yowusa.com/et/2002/et-2002-08a/1.shtml
It's hard to believe 2 blokes, some string and boards did that one...
"...Going back to our spiral of binary digits in the crop formation disc, we obtain an initial grouping of 01000010 01100101 01110111 01100001 01110010 and so on, spiralling out from the centre. (see diagram). We can translate these binary sequences into their decimal equivalent and thus look them up in the ASCII character set to see what letters they correspond to.
Doing this for the whole 'disc' we get the message "Beware the bearers of FALSE gifts & their BROKEN PROMISES. Much PAIN but still time. (Damaged Word). There is GOOD out there.We OPpose DECEPTION. Conduit CLOSING (BELL SOUND)".
http://www.cropcircleresearch.com/articles/alienface.html
aliens communicate in ASCII? Why not?
Edit: Add views from the ground plus the discovery of an LED device...
http://www.cropcircleresearch.com/articles/alienface2.html