The concept of the challenge is to play Hardcore mode with a randomly determined class, gender, name, and build for as long as you can. Narull mentions that you can use the Auction House with gold you've acquired normally, but some players suggest playing with self-found items only or turning up Monster Power for a more challenging experience.
Check out the original thread for all the rules and helpful tips right here.
Image credit: Diablo IncGamers
Sound intriguing? Let us know if you're joining the challenge (or some variation of it), what character you're using, and how far you've made it. Experiences will vary, so be sure to share them!