Blogs Widget Not Appearing

For some reason even though I have installed the plugin in "mu-plugins" it will not appear in my plugin list. If I move it to "plugins" then it shows up, and I can activate it for the main blog. When I activate it for the other blogs it does not appear in the widgets for those blogs. Is it not supposed to? Is there anyway to allow it to appear in the other blogs widget list?

Running WP 3.0.1, new install, subdomains