the last may become the first but sadly, with Blogger Beta, now more aptly called New Blogger, it seems that large blogs still can't switch yet. I noticed from the Blogger help (I don't know when exactly they updated it with that info) that:
"for now, if you have a very large blog (more than a couple thousand posts + comments), you'll need to hold off for a bit. Note that, even if your blog is eligible to switch, you may not have the link to do so on your dashboard. "
Which includes this blog of course. I don't think I have more than a couple thousand posts but they sure are big ones, as the actress said to the bishop.
So, those of us with big blogs have to keep hanging on in there. Still, I've continued to beaver away trying to understand New Blogger and its fancy template code, so I'll be sharing on this blog what I've learned, probably over the next few weeks.