Yes, in the first quarter of 2008.
Other than buying the downloadable tracks Activision puts out, no you cannot.
If by this you mean "How do you get the song Holiday on Guitar Hero World Tour", there is no song called Holiday available on this game, built-in or downloadable.
There was at least 11 songs available as free downloadable content for Guitar Hero 3. However, the downloadable content has temporarily been removed from the PS3 server.
NO
No, downloadable songs aren't available for the wii version yet.
It is not in any Guitar Hero games but it is available as paid downloadable content for the Rock Band series.
It depends. There are lots of Guitar Hero Wii games
No.
Yes, there are downloadable songs for guitar hero world tour.
are you meaning who plays the guitar for the tracks in the background
no sorry
insane