Tip: After editing your overworld, make sure to use an EMPTY save file, as save files with progress may load Mario's position based on previous versions of the overworld. Note that altered level flags will also only take effect on new save files.
I have been working on The Thirteenth Annual Vanilla Level Besign Contest (or vlbc13 for short) since last year, and I'm happy to make a public announcement. vlbc13 is now open for level submissions!
In short, this is a vanilla collaboration hack. This is similar to a VLDC, with the exception of the "contest" element. I'm looking for some creative and well-designed levels, so sign up if you are interested! (I would like to note that submitting a level does not guarantee its insertion into the BaseROM.)
Want to see what you are getting into? You can download the level sampler to try some of the levels already made for the hack yourself. Level Sampler
If you would like to read my document on this project detailing what it is about and the rules, look at this: Project Information and Rules Document
If you plan on making something for this collaboration, please use the BaseROM provided within the information document.
The sign-up sheet is in the document linked above, but for ease of access, use the link below. Sign-Up Sheet
If the "collaboration" aspect of this hack doesn't fare well, I'll simply continue to make more levels for it. I'll probably return next C3 to show off new progress and see if anyone is interested then.
I'm looking forward to seeing and playing what people have to offer. Be creative, and have fun!