Ultimately, however, my story did get buried. If you search for it on Digg, you won't find it unless you check the box that says "also search for buried stories." This didn't happen because the Digg operators have brilliant algorithms, however -- it happened because many people in the Digg community recognized that my blog was stupid. Despite the fact that it was rapidly becoming popular, many commenters questioned my story's legitimacy. Digg's system works only so long as the crowds on Digg can be trusted.
Whether they can be trusted in the long term remains to be seen, given the incentives built into the system for voting on the most popular stories. Moreover, the lack of user privacy on Digg makes buying votes easy.