> What has Mitchell done for Mozilla besides attend meetings and conferences?
Mediating between Netscape and mozilla.org was, and is, a full-time job on its own. It is this part that she will no longer be doing.
She has also been doing a great deal of work behind the scenes on legal (licensing) issues of several different sorts, being the point of contact for Mozilla embedders and distributors, and averting a large number of crises that you never get to hear about (and I had no idea about before I became a Netscape employee.) The fact that you haven't heard about them is a testimony to the way they've been handled.
And you may scoff, but attending meetings and conferences, being a figurehead, takes up quite a bit of time as well. The list is as long as your arm.
Gerv