So sad.

Who knows what great musicals we've never experienced because of his death?
It could have been the doctor's who treated him for the chest pains (his death totally could have been prevented), but he was also believed to have an undiagnosed case of Marfan's syndrome which caused his aortic aneurysm, and he showed some of the symptoms from an early age. (long lanky arms, etc)
And btw: tick, tick...BOOM! is also an AMAZING musical. Like, seriously go to iTunes and download it. Louder Than Words is probably one of the best songs Jon's written. It's also interesting to hear the similarities between his two shows... 'No More' sounds a heck of a lot like 'Rent', for instance. (and Raul Esparza = love!)
If you want to hear Jonathan actually singing his songs, go buy or download 'Jonathan Sings Larson'. It's a cd of his demos, so it's him singing songs from Rent, TTB, Superbia (the other musical he wrote), and a few songs he wrote for his college cabarets and miscellaneous songs. He's not the best singer in the world, but it's very cool. And 'Valentine's Day' is a brilliant song. Oh, and if you buy the CD, it comes with a DVD of a video of Jonathan performing TTB as the one man show it was originally supposed to be. (And Roger Bart is his backup singer!)