Suddently there is a very large ad for "Dead Space" at the top of the page. It was not there last night, and now I cannot see any traditional content - links to purhcase, reviews, forum, etc. Basically either the old header to the site is gone, or covered by this new ad.

Anybody else?

Yes, it sucks.

It's a site sponsorship that's only being displayed to visitors from Google or Yahoo. Sometime in the last 48 hours, you got to the site through one of those methods. Clear your cookies and it will go away.

Please don't tell me this includes my iGoogle bookmarks. If so that is how I access all of my sites and I feel this is a very poor "feature".

It's not a feature. It's a sponsorship.

It does, because I see it too and that is how I access here..

IMO, 25% of the screen isn't big enough. I'd prefer 40-45% or so. Or maybe another one on the bottom.

Perhaps the sides? I'd like a little windowbox feature as well.