From the Blogger Buzz Blog

<quote>
But still, there are times when you really just want to muck around in the code and nothing else will do. So for those of you who feel that way, have at it! Edit HTML is now available for Layouts.
</quote>

Screenshot:
http://picasaweb.google.com/topdawgnate/Web/photo#4969278085885394962

Link:
http://buzz.blogger.com/2006/08/new-old-feature-on-beta.html

Wow! They've totally changed the markup.

It looks more XML/XSL based now, especially when you "Expand Widget Templates".