Yup, you've got it figured out. Wavtek is actually a computer service group based in upstairs offices facing the square. It looks like they originally had some idea of offering wifi for a subscription fee, but they gave that up and switched their test location over to free usage.

My bet is that they didn't remove the "captive" feature from the thing, so you still have to agree to terms of service through a browser. I'll find out eventually, as I intend to add the enhanced software to this Z2 by booting from SD memory. Trouble is, it requires a "Mini SD" and those are hard to find. I've mail ordered a couple, but they won't come for a few days yet.