im about to build one myself (a drip feed system), i am using cut pvc tubing with hydrotons atop a wooden frame on a slight angle with a constant drip from the reservoir. each tube runs into the same runoff bin which is then pumped back into the reservoir. I am ordering a pump online and using essentially the same things jc is talking about. keep an eye out for my journals to come
I am currently using a homemade ebb and flow table and it is performing wonderfully. I am using a ruffneck container for my res, a 20$ pump from petsmart on a timer set to fill up every 4 hours. My res is a tote purchased from a home craft store that is 18in x 36in I had to buy about 3 feet of tubing, one is simply a drain cut to just below the bottom of the stems, and the other runs up from the pump to a whole in the tote, a hose end screws on to hold it in place and divert waterflow.
The table sits directly atop the res, and this was the only thing would have done differently. it is a huge bitch to carefully remove and find a place to set the table, then to reattach the hose while my friend holds up the table. next time im building a stand for sure! Also, cut your drain tube big, you do not not not want your table to overflow, especially with electric cords everywhere!
Something I have also done is dwc. I ended up being disinvolved from my dwc grow but things went well for the few weeks after I built it. The girls were growing quickly under a 400w halide. to do this you just need buckets, styrafoam, net pots, a medium, and a pump with tubing and airstones. for 8 dwc buckets you will need at least a 25w pump, the rule of thumb for a pump is 3w per plant