I realize that. And some, like Poisoned Paradise, are great. I'm talking about official maps, and expanding the standard game. I want to see the standard game grow to become closer to the goal of 30 levels that is cited on the "Zones" section of this website.
I've noticed that a lot of people tell me, when I mention that I'd like to see something in the game, that I can go and download or make it myself. I understand that (though when it comes to creating, I don't really have that kind of skill), but I'd like to see the official, stand-alone game grow. For a couple reasons. One, most of the people I'd like to share this game with are not the types of people who go around and look for add-on content. Two, I'd like to run srb2win.exe and have a large, depth-filled game (it already has TONS of depth even now!!) to explore.
So I understand your intent, and you're right that there are some good maps out there, but I'd like to see the official SRB2 expand.
I got an idea. How about if, with level designers' permission, some of their levels get added in a special "community" mode that's added to the official game? It could be a separate set of levels that is unlocked after completing the main game, and they could be selectable. How about that idea? Sonic Team did something similar in Chu Chu Rocket for Gameboy Advance, in which they included tons of levels made by people from Europe, the USA, and Japan.