I use a Festool Vac Sys kit which I attach to a Festool bench or sometimes to my very low tech, height adjustable cart.
I know the VACS is not available in the US (yet) but there are many similar things around. Cost me about $2,000 all in with the pump, two swivel bases and 6 different vacuum heads. Probably the best investment I've ever made in the shop. My cheapo cart was about $400 - not so good - I'de prefer a hospital bed style arrangement.
I think if I had the money I'd be tempted by one the Vakuucars, but I agree that with the ingenuity of the FOG it should be easy to go the home-made route.
Richard.