It's Megan's baby, so I'll let her decide, but I definitely think we should reveal secret santas at some point--it's no fun if it's forever a secret. I do like the idea of the forum guessing!
I'm hoping we can open the gifts when we receive them. First off, I just don't have the willpower to hold onto a gift for two weeks if it's sitting in my house, and if we wait until Christmas the guessing might get lost in all of the posts about items people found under their trees! Plus Chanukah is actually really early this year--from December 1 until December 9--so it seems mean to make people who don't even celebrate Christmas wait two weeks to open their gift!