XDA Forums might not be the largest hacker community on the web, but it is certainly the most influential. And today they noted the amount of hacking going on with the new Nook touch and they promoted the 2 month old ebook reader to having its own forum.
You can find the forum here. There's not much all that many posts there just yet, but I expect it to grow. The NooK touch will probably end up the second most hacked ebook reader after the NookColor.