Plugin Suggestion: Global Header Content

WPMU DEV currently offers Global Footer Content, which allows insertion of code into the footer on all sites across a WordPress MultiSite install. It would be quite convenient to have a comparable plugin (or an expansion of Global Footer Content, perhaps) to do the same with the header. One of the most readily apparent uses for this sort of plugin would be network-wide deployment of development frameworks which have both a CSS component and a JavaScript component (e.g., Bootstrap).

+1 if you're interested in such a plugin/expansion of Global Footer Content.