You can now check out all the details for the 2010 Howl-O-Scream on the official website. As you can see, the mazes are the same as last year as well as shows. It would appear that the, barring any unexpected changes to the mazes themselves, the park has concentrated on turning the entire park into a scarezone.
The only place to find all the details about the scarezones is on BuschGardensWiki.com.
Go check out the site or our wiki for details, then come in an join the discussion in our FORUMS.