I'm really sad, but not that surprised to read about the death of Grant Hart. In my view his musical and songwriting talents were incredibly underrated and I hope history will be kind to him, as he never achieved the recognition he deserved in life. There aren't that many drummers who sing lead vocals, and Grant Hart was right up there with the best of them.
Years ago, when I was a teenager getting into grunge, lots of these bands cited Husker Du as a huge influence on them, so bought their live album on cassette and was blown away. Eventually I ended up owning all of Husker Du's albums and, to this day, some of them still get played regularly. As Vinegar Tits points out above, Hart's next project, Nova Mob, were pretty damned good as well, but he never saw much in the way of chart action. Nova Mob's concept album The Last Days of Pompeii really deserved far more airplay than it actually got, but Hart seemed destined to forever remain in obscurity.
His solo career never took off and he spent years playing in bars for very little money. There were rumours going around a few years ago that he had HIV, which given the fact he was a promiscuous gay man with a raging heroin habit in the late 80s and early 90s, may have had some substance to them. Grant Hart never made much money; he lived in his late parents' home until he accidentally set fire to it a few years ago. But he kept of writing and performing right up to the end, in the face of complete indifference to anyone but his minuscule fan base. If ever there was a case of life not being fair, Grant Hart probably fits the bill as a prime example.
Oh, and the name of the album that got me hooked? The Living End.