I was going to switch to the new blogger before this but they wouldn't let me:
Unfortunately, we cannot switch your Blogger account at this time, because one or more of your blogs cannot be moved.
Which was a bit bizarre. I only have this one. And it's insanely small.
And then yesterday, I was just about to update the February blog posts entry and I couldn't get in to edit the blog at all until I upgraded. (Had to jump through hoops to get my google account sorted out)
So, now the upgrade is done. I'll be interested to see if it's better and/or how different things are.