Well, it’s my opinion that technology can’t solve the discovery problem. I know we want it to. But at some point the technology has to evaluate the content. It can’t - so technology gives the content to humans to evaluate. However, it can’t evaluate the humans’ capabilities. :/
You discover a directory like mine just as you would discover any other link, johntash - by coming across it as you read, perhaps on Hacker News. If there were more directories, they would be easier to discover. They happen to be richer discovery points than a normal blog or profile page.
Maybe an idea would be something like what you have, but using some sort of standard that could be pulled down similar to rss feeds?