Impressive. I just switched the blog to Blogger Beta, expecting to have to fix a bunch of things because the template has such a customized look. Instead, beta took it all in stride--the new blog looks just about like the old one did. Those Google folks sure know their stuff!
I'll probably go ahead and switch templates, though, to something that looks similar but uses some of the new layout features, just to avoid having to muck with HTML every time I want to change something, so expect a moderately new look soon.