Hydroponic PC Grow Case - Secret Herb Plant Hydro Box - (eBay.ca item 330311771104 end time 09-Mar-09 18:16:36 EDT)

Just took this from another post... but its pretty much what your talking about...

I think you could maybe yield anywhere from about 10-30 grams with this case. Might be a good idea, if I had like 3 or 4 of these, considering I go through about an ounce a month. But then again, who needs three or four brand new cpu's humming in the corner of every room in the house. For me, impractical, but If you only smoke here and there, then ok... get two!