So many things to say about where Twitter's lists point, the thing is, I've said them all already, many times over many years. There's a whole architecture already designed and deployed for lists and lists of lists. And they form directories that are much more open than the original Yahoo directory or DMOZ. I know everyone thinks DMOZ is the most open directory possible, but it's not.
The list structure of the Internet should be a open as the web. That is to say no one gives you permission to create a web page on any topic you like. So if you want to create a list of resources, that might include Twitter users, but might also include many other things, go ahead. Be the best you can be. You don't need anyone to let you do it.
If you're good, I might include your directory within mine, thereby delegating that topic to you. If something better comes along, I might unhook yours and replace it with theirs. Or I might get fancy and join yours with theirs, forming the sum of two lists.