Minor adjustments

I've decided to give the Carnival of the Vanities its own section on the sidebar, rather than a single entry each week which (1) draws heinous amounts of spammers for some reason and (2) requires me to come up with some cutesy verbiage which exploits the individual Carnival number, which (3) Andrew Ian Dodge isn't using anyway.

In view of this change, and the fact that not everything I do around here is exactly intuitive, consider this an open thread to post your questions about site mechanics, motivations and policies. (Besides, there's a Woot-Off today, so I'm probably not going to write a whole lot of new stuff.)