According to ONM, information on Animal Crossing will be showcased at E3 next week. There was a big hint in the latest issue of the magazine to this, but they have technically let slip confirmation, as they clearly didnt intend (or werent meant) to reveal it.

Tom East, Online Editor for the magazine said in his blog:

 Those of you who have read the new issue of Official Nintendo Magazine should already know that Animal Crossing Wii will be unveiled at the conference.

However this was later one removed and replaced with:

Of course everyone is hoping that Animal Crossing Wii will be there but what else would you like to see. What would be your dream line-up be?

So it looks like they were meant to keep quiet, but it looks very much like we will get some more information about the game as we dont know very much at the moment.