I used Windows Movie Maker on my XP system for years and it had its uses. I like WLMM much more and would consider using it extensively but the Export Option is limited to Windows Media format which contradicts what I read on the link below about being able to choose between AVI or WMV9 outputs:

Export Formats in Windows Live Movie Maker - What to Choose & How to Do It | Maxiorel.com

Is the info on the above link wrong or has Microsoft just eliminated AVI output since April of 2010? Why isn't AVI output an option in WLMM?