I just bought us tickets to Book of Mormon!!!! I found some that are for 4 months after our wedding (and the week of Valentine's day!) for a "reasonable" (ha!) price. We've been wanting to see it since it opened, but tickets have been impossible to get.
(Um, for anyone not in NYC - this show has been sold out of the cheapest -$70 - tickets for a YEAR in advance pretty much since it opened. With how much recognition it's had/stupid Comedy Central constantly advertising it, it's been insanely difficult to get tickets for less than $300/each. I found some for $150/each).
Now I just have to somehow keep it a secret until the wedding.