These are Diamond Piers:
http://www.diamondpier.com
Instead of digging deep and pouring cement,the Diamond Pier is a cementious block with 4 sockets set at angles. Long steel pipes are driven into the soil through the sockets,pinning the block in place,preventing frost heave.
No digging needed,super cool.
Of course I want to do it on the cheap.
Well, at least steal some of the principles.
In particular, I can see digging a about hole 2' wide 1 deep,and inside that hole driving four sticks of #5 or 6 rebar equidistance around the perimeter.
A hammer drill with a ground rod driving bit would be ideal for this.
The rebar would be driven about 5' deep at 45° angles,
The concrete is then poured,with provisions made for tying in a post or pier.