tiredofit

Allows you to randomly visit a blog in your multisite network by appending ?randomblog at the end of your URL string. 
You can exclude by blog ID, mature or public status, and even change the string to whatever you like. 
View a working demo at <a href="http://www.bicycletouringhub.com?randomblog" rel="nofollow ugc">http://www.bicycletouringhub.com?randomblog</a>
<h3>Contact and Credits</h3>
Written by Dave Conroy (<a href="http://www.tiredofit.ca/?ms-random-blog" rel="nofollow ugc">www.tiredofit.ca</a>, e-mail ‘dave’ at ‘tiredofit dot ca’), 2012-02. 
Written inside of a tent while he bicycles the world for <a href="http://www.bicycletouringhub.com" rel="nofollow ugc">www.bicycletouringhub.com</a>

Multisite Random Blog Redirect

Allows you to randomly visit a blog in your multisite network by appending ?randomblog at the end of your URL string.

webdevstudios

Michael Beckwith

Justin Sternberg

A new dashboard widget in your network admin dashboard will show total published and draft posts and pages across all the sites in your network, giving you a snapshot of the current status of your total content.
Contribute <a href="https://github.com/tw2113/Network-Sites-Counts-Dashboard-Widget" rel="nofollow ugc">on Github</a>.

Network Sites Counts Dashboard Widget

Display a list of post counts for all your sites in your network.

Multisite Random Blog Redirect vs Network Sites Counts Dashboard Widget