if you liked nirvana's unplugged you should check out alice in chains unplugged. it blew it away imo. i dont like nirvana for the fact that they killed the solo but they arent to bad.
the only reason grunge died was because of kurt and it only died to the trendy people. but then layne died and that pretty much killed it. you do have some decent frontmen coming out now though. jerry cantrell, chris cornell, dave navarro, etc. its just not as good as it used to be.