With the RTM of SQL 2008, it looks like a slightly older version of the add-in has been removed from microsoft.com. Unfortunately, all of the search engines (including Live) are pointing at the old, dead page.

If you search for the add-in directly from Microsoft.com, you’ll find it here:

http://www.microsoft.com/downloads/details.aspx?FamilyID=200fd7b5-db7c-4b8c-a7dc-5efee6e19005&DisplayLang=en