This is like a Beta feature, so it's available on Blogger in draft instead of the usual blogger. Due thanks to http://nishantranka.blogspot.com/ and http://ithinkshuffled.blogspot.com/ for the idea!
We can customize EVERYthing with this - from backgrounds to width to layout to the littlest detail! And we have a live preview of our own blog to actually see how stuff will look before applying it.
I think they've actually stolen the march over other blog sites with this tool! KUDOS to the blogger folks!!