Great question! Yes, I have met at least one Hubber in person (who lives in my city), and traded personal messages and phone calls with several others. I never thought I'd make new friends through writing here, but that's how it feels.
I highly recommend meeting Hubbers and getting to know them - it's a way to support each other and to get advice when you need it. Writing is a very isolated type of work, and connecting with other writers helps you feel less alone. I'm hoping there's a meet-up in my area at some point.