And as I mentioned in another thread, Birdy, you are a wonderful guide and host, as I found out last fall!
However, I will warn anyone wanting a "walking" tour of NYC, you'd better have excellent footwear and be fit enough to cover a lot of ground. It was so much fun, with great views and terrific history lessons. Being a former resident of the Big Apple, I still saw many places I had never visited -- it's a big town and I left in my late 20s -- mannnnnnny years ago -- with only one return in 1990. Things sure have changed since then -- for the better I must say. I can't wait to go back again.