All right fagets, we're making a Super Mario World ROMhack. You know those VIP Mario series made by our friends at 2ch? It's just like that. Each one of us is will make a level until the entire game has custom levels.

Here's how it'll work:
First, everyone interested will download Lunar Magic (a Super Mario World level editor): http://fusoya.eludevisibility.org/lm/

Here's a handy tool for testing your levels within Lunar Magic as well: http://www.smwcentral.net/?p=section&a=details&id=4840

Second, go to the wiki and find an unclaimed level, then claim it by its hex digit number. Claim a sub-level if you like as well, stages are often comprised of a "main level" accessed from the overworld and separate levels with their own tilesets for stuff like going down a pipe or exiting through doors. This step is important to ensure that people don't end up using the same levels by accident.
http://vmakeashityromhack.wikia.com/wiki/Level_list
http://vmakeashityromhack.wikia.com/wiki/Sub_levels

When you're finished with your level goto File -> Save Level to File or press Ctrl+W to save your level separately as an .mwl file. Do not save your level with the ROM! This is important--we want to be able to rearrange these levels how we want to when we finally have enough. Now take your level file and upload it somewhere. Mediafire and MEGA are usually pretty reliable, there's Dropbox too. Make sure you link to your upload on the wiki's corresponding level page, this is how we're going to keep track of all these levels. When we have enough levels we're going to sort them by difficulty and/or theme and put them together with a new overworld.

WIKI: http://vmakeashityromhack.wikia.com/wiki/Vmakeashityromhack_Wiki

IRC: irc://irc.rizon.net/vromhacks
For you plebs without an IRC client: http://webchat.irchighway.net/?channels=vromhacks