I've seen these on UHF but never on VHF. I saw color bars and heard a
tone Monday evening.

From responses to email sent to Glenn Hauser and usenet postings and
some Googling it is probably Island Broadcasting, WNYZ-LP, on top of
the Citibank (or maybe Citicorp or Citigroup now) building in Long
Island City (Queens). They already have a few stations on UHF. The
programming is probably going to be mostly ethnic.