With the release of Office 2008 for Mac SP2, I thought I should update my version. I just couldn't remember how to launch the Microsoft AutoUpdate program manually. Sure, it runs and checks when I launch the Office apps periodically, but I wanted to launch it manually right now and not launch Word/Excel/PowerPoint. So after doing a spotlight search, I still couldn't find it. I resorted to launching terminal and performing a 'ps -ax |grep -i autoupdate'. This revealed the path I was looking for:
/Library/Application Support/Microsoft/MAU2.0/Microsoft AutoUpdate.app/
Now, browse to that location and lunch the app. It searches for updates and happily proceeds to install SP2.