It will come out on the 15th of March 2010, Club Penguin time. The time of day is not specified.
in the mine
It is in the mine.
Next to Puffle Rescue.
eather bean counter or puffle rescue i don't know for sure.
Its in black puffle rescue near the end
go to the mine and where the puffle rescue table is, go under the coats.
you find th key in puffle rescue with black puffles and go for the shadow
Play the black puffle rescue and follow the Shadow of the octopus and then you are in the secret room and you have the key.
You can buy it in the clubpenguin store
you can't
If you exclude "of these" from your question, the answer is Jet Pack Adventure, Catchin' Waves, Ice Fishing, Puffle Rescue, Hydro Hopper.
You have to play black puffle rescue but you have to be a member