I have seen many types of side bets on Blackjack.
One should remember that the side bets on Blackjack are a much worse proposition for the player. I've been told that its 5% or better for the house on side bets.
The most recent ones I saw were at MGM Detroit and Win Star Thackerville, OK.
What are you seeing in Las Vegas and what is the payoff?
(We really should have covered this topic in the Gambling thread, oh well!!)