Where to play.

I only know of two poker rooms that offer this game at the moment.

Ultimate Bet

UB is the place I play at regularly. It's mainly played by Americans and I am often the only European at the table. For this reason there are more players after 8pm BST or 3pm EST. You will be lucky to find players before this. You may get there and see empty tables. If this is the case join one anyway. You will usually be joined quickly by other players AND you get a 25% bonus on your UB points, so if you are clearing a bonus it will clear quicker. Ultimate Bet is a great site anyway, without the Pineapple, and if you join using any of the links from this site you will get a 100% up to $650 .
They also let you practice on play money tables to get the hang of it. For details click here.

PARADISE POKER

This site also offers Crazy Pineapple. It's a similar thing to UB, except sometimes the games seem easier and there are more people playing. You can't play at .25//50 though so it might be good to learn how to play on UB then transfer across when you are ready to play. As well as Pineapple, Paradise offers loads of other great games and has some good guaranteed tourneys as well. For more info click here.