Enplaned was an interesting blog about the ins and outs of the airline business. It didn't mince words, nor did it hold back on praise when it was due. But now it seems to be gone. Speculation on the Joel on Software discussion board is that it might have been pulled because of a lawsuit or threat of a lawsuit (which would be bad) or because the author has a book in the works (which would be less bad). It doesn't show up in either the Google cache or in the Wayback Machine.
Apparently it's been dead long enough that Bloglines unsubscribed me to it at some point. The discussion has just come up in the last week, but I don't know if that means the blog died in the last week or what.