I posted a rather lengthy article yesterday that got screwed up a bit. I tried to use "Windows Live Writer" to write the article offline. That didn't go well, as I accidentally posted just the title and the word "blah". I removed that immediately, but it sill made it to the feed somehow. When I reposted the final article Live Writer reused the URL and so therefore it never showed up in the feed.
Anyway, if you missed it, check out
"Using JRuby and ActiveRecord Migrations to Manage Database Change".