If Viva Piñata does not come out "for ages" where you live, then it means you do not live in the US, but you will be happy to know that the US version of the game will work on your console, wherever you are.
Eurogamer has confirmed that a US copy of the game is functioning on a PAL console. Not only does this mean you can get a copy for less than the brutal price shouldered by most of the world, but you can also get it before the December ship date in Europe.
If you're planning to buy this thing for the kiddies, you should know that there is a cool "driver's ed" style feature in the game. As reported by Major Nelson in his latest podcast controller 2 can take over the game controls temporarily to help the youngin's through tough scenes. If only Gears had that feature, you could teach your 5 year old about the proper handling of a chainsaw.
There are a few game exporters out there that should have no problem getting you some Piñata action right away.