I stumbled across this list of the oldest 100 .COM domains this morning and found it interesting in a "Hey-look-at-that-cute-little-nostalgia-over-there" sort of way. Two observations: (1) It's not a comprehensive list of the oldest domains. It's only for .COMs and (2) it only take into account those that are still currently registered (or at least were when it was compiled.) Still it's got a bit of geek interest.