This is my robot .... under construction...
Some facts:
1) E_k=(1/2)m * v^2 ; E_p=mgh ; things cost ! Need energy for everything .... When I say energy I mean that energy that your hands needs' to give to do work ....!
And as you know energy comes from food.... not from nothing ! Take care not to be cheated because energy that you give when you work is not free, doesn't come from air ! It comes from food, unfurtunatlly
I can't even imagine what is industry with out energy .... Man working with his hands ... and being payed with nothing ....
2) Fossil fuel is finishing, gas is finishing, uranium is finishing and human controled fusion was not achived till today ...
3) There is lot of light comeing to us ....
4) Work in agriculture is not so easy especially when other are wasteing energy and monet with super cars .... good not for africulture ....
I like pictures with good cars Ferrari, Lamborghini, Mercedes, BMW .... but food ... does not grow simple .... We need energy for it ! Don't espect us to work in agriculture without energy and you drive Ferrari, because we want !
Ferrari is nice in the museum.... Sorry, I like Ferrari (my favorite cars F50&F40) but .... energy is needed elsewhere....

Because of this here's this site ... trying to find solutions for energy sources, tools, cars for agriculture ...
The robot(s) I'm planning to build are for agriculture... but they are somehow like mars rover-Spirit ...
This unfortunatlly can't be done so easy and fast .... Lot of time, tenth's years of work and many ohers....

What Is planned for the robot to have:
1) eletrical engines
2) video recognizer needed for "walking" on the road, for recognizeing different plants, do things that need many artificiall IQ ...
3) RX/TX need to comunicate with server. Server will compute many hard decisions need to be taken. Desktop computers are much powerful and are cheaper.

Related articles:
Robots at their home....
Bla-bla-bla

Usefull stuff:
(*) Original idea from the game Ri_Li