I updated SharDB (Download) for WordPress MU 2.9.1.1 and added support for the comment meta table.  

Our larger WordPress MU install, Homeschool Journal has been running on multiple databases for about 3 years. Technically, it’s possible to have thousands of blogs in a single database install. Usually where people running MU start to have issues with the number of blogs is with getting complete...

Sometimes this happens, you’ve built the site and have to or want to change the domain it’s on. Or you did dev work on a different domain and now it’s time to go live. The domain name is actually stored in numerous places in the database, as well as one line in wp-config.php. Every...