I'd like to see the (very) occasional broadcast message or email from staff when important changes are made. This is especially true as the site is still new and evolving rapidly.
For example, I bet not many folks know that the posting guidelines have changed. I only know because I was busy trying to read everything. The sticky announcing the change doesn't really stand out.
A quick PM to everyone (or email) saying "Posting guidelines have changed, please go here (link) to read them. might be a good way to get the word out on some things.
That said, I don't want 10 msgs a day either, but I don't think that will be a problem.
Best,
Jim