I will certainly be there as I have a table at the show this year. I enjoy talking and I live in the area so feel free to come and say hello even if it is just to ask where to go to get Chicago style pizza or award winning BBQ etc.
I really doubt that they will start charging for their regular accounts. There have been rumors like that ever since I joined facebook. But, it never happens and it doesn't make sense as I think most users would just drop their accounts.