My lad (15) decided he wanted to make a new logo for the site just as an experiment. Personally i think it's great! He did some others, however no-where near as good as the MM one!!
Looks cool. I have zero artistic ability but that said we didn't have tools like CS3/4 when I was a kid. DPaint III was about as good as it got and whilst impressive for the time the toolset CS3/4 provides is immense.
Of course your son still has to have some design flair to pull off a logo like that. Looks really good.