Take a look at another private website dedicated to LEGO TECHNIC constructions!
It calls 'TEXBRICK', belongs to Thomas J. Avery and can be found here.
There you can find very interesting buildings, from cranes to excavators and bridges, fully documented with photos and details of construction.
Also very interesting thoughts, ideas and techniques can be found inside.
I found specially interesting, the maths and Excel file for modeling truss structures, specially bridges. Find more here.
Very funny, was one of author's comments at the FAQ page (from a former website version, not available anymore):
"- When you have kids, will you let them play with your Legos?
No. I'll buy them their own and then I'll play with theirs!"
... don't know why,... but I fully agree!...