I say no on the Santa thing. I just feel it's what other people call "justifible lying" I mean our society goes to great lengths to prove to kids that he's real and then eventually kids find out he's not. what a disappointment.
If I have kids, I will not share "santa" with them. To me, X-mas is not about swapping gifts and all that, it's about celebration of the birth and life of the big J.C.

and celebrating our lives and making the most of it. We should celebrate that every day and not "just on Xmas"