There was a news item today possibly of interest to those who self-host WordPress: Automattic unveiled the Jetpack plugin. I hadn't heard of it before, but going off the announcement and the site FAQ, it looks as if it's going to provide multiple bits of functionality in one package (WP.com Stats, Twitter widget, shortcodes, etc).
My issue is wondering whether this might be overkill. Wouldn't it make more sense to use a few small specific plugins that do what you need, rather than installing some big assembly when you only have a few specific needs?