While doodling around on YouTube, I found a few videos on WebSphere App Server. Of those, one was completely about their marketing packaging. This one, however, seemed relatively useful. It covers WAS scripting interface (a.k.a. wsadmin).
If you have never bothered before, here are a few things you can do:
Repeatable application installation
Precise setup between test and production environments
Remotely configure a server without a browser/gui (i.e via SSH)
Hook into automated build/testing tools for repeatable testing.
The interface is available in the WAS install directory under /bin/wsadmin.sh where means the following on these platforms:
Windows: C:\Program Files\IBM\WebSphere\AppServer
Here's the video. I'll post a couple of useful scripts later