He reminds me of a Ziggy too! He'll just have two names- One for friends, and one for Business ;]
I expect he'll stay out of sight for a while, until he adjusts. I do wish I'd remembered to weigh him first- I was so concerned with getting him out of the rain and into his new home I spaced on it. I doubt he'll want to come out now though, if I could even get him! He held onto the little deli lid with everything he had, and it was admittedly more strength than I was willing to tug at. I bet he could hook onto a piece of wood and just say "no" to coming out.
I guess I'll try and snag him if I see him out and moving... somewhere like the branches maybe. That way I can get him into a cup, onto the scale, and right back in without fuss. Then I can go find some food for him for later this week, once I know how much he weighs.