OK, just bit the bullet and upgraded my Blogger blogs. Got a free 8000-impressions PyRad as part of the deal, which I spent on an add for this blog, of course. You get 20 characters for the title (exactly the length of Radio Free Blogistan, it turns out) and 50 characters for the body of the ad, which I spent thusly:
long story short: blog meme tipping point metablog
I still have some work to do turning on the weblogs pings for my blogs, turning on the RSS feeds, adding the title fields to the template, and replacing the Powered by Blogger ads with Powered by Blogger Pro ads (or removing them entirely, which paying customers are permitted, if not encouraged, to do).
Here’s an idea for another Blogger Pro feature: better templates!