You can't put a trademark name at the front of a product name is what I have been told unless you get permission from the trademark holder. Not sure if this is true I also would love to know the reason.
I have no clue if you're right but that sounds as reasonable as anything else I know about the trademark/copyright/i.p./patent system.
Edit: This actually seems like a sane restriction in the context of the trademark system. Without even looking up the rules, it's pretty obvious people will see "Linux ..." and assume it's endorsed, or at least unopposed, by the trademark holder, which can be somewhat ambiguous with free software since it can be used so freely.
