The site has been fully transferred to the new server. If you're seeing this message, it's because the nameservers have not updated for you as yet - so you're still requesting the old server. This process is automatic and the site will begint to load for most visitors at some point this afternoon.
In the mean time, you CAN access the site in FULL via the temporary URL here: (images & saved bookmarks wont work, but other than that... you're good.)