Mikhail Tal was great at sacrifices, and that is a really good example of one that he is helpless in. My advice.... Play whatever works, and when it stops working, play something else!
Fried Liver Attack

Neither the Fried Liver nor the Wilkes-Barre has any refutation - with best play from both sides both end in a draw.
How could you know this though? We don't have a 32 piece tablebase yet.

This looks like a stubborn defense against the fried liver.
Instead of 6 Nxf7 white can play 6 d4. Bobby Fischer has stated that 6 d4 is the strongest move with clear advantage for white. Computer analysis with Rybka confirms this.
In practice 6 Nxf7 will win many games. A player with black playing 5..Nxd5 probably does not know how to defend against Nxf7.

@PP2
you made a couple of mistakes there after Ncb4 white shouldn't play Qe4? they should play a3 once the knight on b4 move take the other knight...8.Nce7 is much better.

Yes white probably will, I agree that a3 is a mistake at higher levels but at 1500 and under it is probably playable...

Wasn't there a queen's-rook-odds game by Paul Morphy where he used the Fried Liver and could have finished the game with 0-0#? (Though he chose not to, instead just moving away his king to deliver discovered check.) I recall it was a pretty cool game.
Actually, it's cooler than it may seem on the surface. Paul Morphy played this game when he was 12-13 and his opponent was his own father. Granted, his father wasn't the second best player in New Orleans at the time - that honor belonged to Paul's Uncle Ernest- but Alonzo was certainly a chess aficianado who knew his way around the chess board. Paul offered his dad Rook odds, gave him the Knight in the Fegatello and mated him with 0-0.

I often get the impression that some of those games were fabricated because their culmination is just so conveniently picturesque.
As far as moving the King instead of castling to deliver the checkmate, here is one beautiful game by Edward Lasker that to comes to mind, Queen sacrifice included:

Thanks everyone! Fantastic thread. And Bat Girl, thanks so much for the Morphy game. Amazing.
Yeah, I also posted a Morphy Game. If you like the thread then try the group!! Here's the link : http://www.chess.com/groups/home/fried-liver-attack-fanatics
Fried Liver seems to be legit! it is like a botched King's Gambit when your king ends up in the middle of the board....