Phrekaly at CNCNZ.com
has created a unofficial tester's guide to the MP test. Here is a clip:
A few other things a tester can do is to keep their eyes open for any remaining pesky graphical errors, like voids and clipping issues. Make sure you keep a screenshot utility handy to snap shots of anything you do come across (at least until the SS utility is activated in a later patch), all the better to show EAP what went wrong and where it went wrong. Sometimes the best way to test for bugs is to do anything that isn’t normally associated with playing the game like typing random keys ect… to see what happens. Always remember should you find anything unusual, be sure to write it down somewhere and then head to the official test site and report it using the bug submission form. Not everything can be tracked by the backend monitoring that will be going on during the test. This is only part of my job.
You can get the rest of it Here.