It’s the first time we’ve actually got any sign of a “new” opening date, but this news article was released two days ago and it says:
“Sometime this year, [J.K. Rowling] will launch Pottermore.com. The grandly ambitious website was supposed to launch in October, but has been delayed until early 2012.”
So hopefully it’ll open in the first quarter 2012.
(submitted by msteele)