Sounds like Tom Tom stepped on MS's feet somewhere, so they're biting back. But this time with lawsuits since this is a company they can just get rid of with one good swipe. The thing is, if they're really in danger, the FSF and the Freedom Law Center will just step in and back up Tom Tom on this all the way. Just because MS decided to sue doesn't mean they've got a case. It just means for now that they see a threat in Tom Tom and a possible chance to rid themselves of a competitor.