Or you could stop playing guitarhero because it is a fucking button masher and I have no fucking clue how this game got so popular. It is like fucking Halo fucking pile of steaming shit but everyone likes it for some reason.
This game was made for rednecks who like to pretend they are the next big thing by pushing buttons.
Why would they sell the guitar piece separately? Its made for the game. There are no other games that use it (yet), and the game requires it. They won't sell it by itself for QUITE a while yet (if ever), and if you lose/break it... well, its 50 bucks and you get another one with a game.
Now *IF* you can play single cart multiplayer (DOUBT IT) they *could* sell em separately... but that would be a BAD idea for sales.
As well, with a special addon, it'll cut down MAD on piracy. Hell, i'm picking up 2 (for Wife® and I), and that wouldn't happen w/out the addon. So its doing its job.
Hehe, trumpet hero would probably suck. But homebrew is something I hadn't thought about. The Melody Otario homebrew would benefit hugely from using it. Not to mention people could probably make custom songs for GH (though that'll probably take a while, seeing as it's only 4 frets, you can't just rip already made songs on the internet or on former games). Awesome piece of kit to play with though!
Guitar Hero: On tour is a peripheral for the DS Lite only, which is attached to the slot 2.
It will most likely be only available as a package, as there is no reason why they should be separate. This may change when a second version is released. A 3rd party version may surface. (Maybe on DX! XD)
Trumpet hero would be heaps funny! I can just imagine the ad for it with some dude rocking out with his DS trumpet...