This bash script will let you replicate a WordPress MU blog environment from live installation into a sandbox, altering and rewriting wp-config.php and database entries to make sure URLs work the right way.
Most WordPress installations in the corporate world have development cycles like this: Dev -> QA -> Production.
This is wrong.
It should go Production -> Dev -> QA (Presuming if things check out, changes are pushed live.)
Sure, the standard operation might work before you launch the blogs - but - after that point content and configuration ends up mutating server conditions. Thus, replicating the environment to either troubleshoot, modify or install new components becomes a large chore.
Most developers end up with an environment where development is so far removed from production that they end up wasting inordinate amount of time communicating with QA over replicating simplest of bugs.
This example shows one machine replicating to a sandbox subdomain, though this should work fine over mounted fileshares. These are script configuration options that would clone http://blogs.mywebsite.com/ into http://sandbox.mywebsite.com/