Thanks for the heads up, That is literally right around the corner, and I never knew it existed. I've just recently started getting interested in trying hydroponics, after seeing another student's basil breeding project at the research greenhouses on campus. I'll have to check this place out!
I live in the "boro" too. It is on Amwell Rd and local zoning doesn't allow him to be "open to the public". Shoot him an e-mail or call and he will meet you in the greenhouse.