Konami is pretty upset. They recently filed a patent suit against Harmonix, MTV and their parent company, Viacom. Apparently, a little game called Rock Band
(you've probably never heard of it) violated patents Konami
had filed in 2002 and 2003. The suit seeks to block Harmonix from using Konami's "inventions" and also get compensation in the form of lots of money from the company. With Konami having introduced GuitarFreaks
(a game utilizing a guitar controller) to Japanese arcades nearly a decade ago, it seems likely that this is what it's all about.