Ben the lego king,
Are the pictures to which you linked above officially released from LEGO? (Given that at least one of them is marked 'Confidential', I'm going to suggest that they are not. You might also want to review the policy on linking to leaked information on these forums. That policy can be found
here.) Until you hear things straight from the horse's mouth, everything else is just pure speculation. I think I'll just sit back and wait until I get my catalogues delivered to me instead of making assumptions based on suspect evidence. And remember, not all sets are released at the same time of year, so we'll have to wait until 2009 is finished to know if 2009 will contain Castle sets.
For my part, I recall an interview with a LEGO employee who said that Town, Space, and Castle were special lines that LEGO will always produce, unlike, say, Agents. For that reason, I am confident that we'll see Castle this year.
----Edit----
Here is a quotation from the article I mentioned above:
"However, there are certain themes—like Space and Castle—that we consider evergreen themes, and those are rotated in and out over the course of a few years. When a theme is a classic, we often maintain the theme, but rotate the new models on a shorter term to maintain novelty and interest in the market."
And here
is a link to the whole article. There are lots of interesting things in there, so it's worth reading through if you haven't already seen it.