On one hand, I think it's totally awesome that some guy broke out the Guitar Hero clone Frets On Fire and decided to add Pink Floyd's Dark Side of the Moon album to the game. On the other hand, I gotta advise him to get a life.
And on the third hand, I must say I'm not sure about his decision to turn the whole album into one long track. I like me some Guitar Hero, but I'm not sure I could sit down and plug away at the same track for 43 minutes. If I failed somewhere around "Money" I'd be downright miffed that I had to play through those twenty-plus minutes again.
(Also long, but more playable: Metallica's "Call of Ktulu" and The Eagles' "Hotel California."