So I have another admin on my blogging system, just because we usually admin together.
Anyway, he mistook the main site for his own personal blog, and published a personal post in our news feed which was lovely.
Anyway, so I had to put a warning on the main blog so that anyone using it is aware it's not their personal blog. Since I wrote a quick plugin for it I thought I'd share it.
Basically it works like this. You edit the HTML in the file (it's extremely basic, I designed it to set up once and go) and then install it. Activate it on the blog you want the warning for. If you're using the SA plugin filtering thing, then you can hide the plugin from normal blogs.
Screenshot: http://i41.tinypic.com/bdmix3.png (The blank space is me blanking my site name. Why? I've no idea)
There's probably something that already does this, but I couldn't find anything. My method is seriously low-budget, no options page. Just hooks into the dashboard to add it just like the RSS feed does.