Here are some photos of my wooden brew rig. I finished it back in February, have brewed half a dozen batches on it so far and I'm incredibly pleased with it.
It's a pretty straight forward design. I added some galvanized flashing to the burners to serve as wind guards which allows me to run the burners at a lower intensity without risk of them getting blown out on windy days.
The dual outputs from the pump allow me to whirlpool at then end of the boil while I am chilling then simply close one valve and open another in order to transfer into the carboy when pitching temperature is reached.
The HLT serves as the pre-chiller tank once I am done heating sparge water which is nice and convenient.
I know lots of folks worry about the safety of a wooden brew rig but the amount of heat needed to cause a 2X6 to spontaneously combust is far beyond the temperatures generated by the indirect heat of your typical propane burner. Sure the wood gets hot, but not too hot to touch (even right next to the burner) and I have not seen any sign of scorching, nor do I expect to.
Front View
Rear View
Shelf Detail
Pump Detail
Propane Detail