I was first exposed to the poignant classic Club-To-Death Angel Dokuro-chan a while ago via Question-san, over at The Hell House blog. I just watched one episode, but my God if it wasn't the most ridiculously hilarious thing I'd ever seen. And now it's coming to US DVD by way of Media Blasters. Score!
Of course, the concept of killing the same person over and over again might loose it's novelty after a while, but hell... it worked for South Park, didn't it?