From March 5th to 18th, a new classic Doom megawad will be in progress. The result will be uploaded on 20th no matter how many maps were submited. It will use ZDoom's MAPINFO to split the maps in episodes (acording to its themes), add victory messages, and a proper victory screen at the end, but to keep the classic style, and to add more balance between submissions, maps will only use limit-removing stuff (no ZDoom/Boom features). In fact, the maps alone could be played in any limit-removing port.
You can follow the project on this thread: http://www.doomworld.com/vb/showthread.php?s=&threadid=39487
We'd like to invite the whole Doom community to be part of this. If you have a map you never uploaded, or feel like designing a map for a megawad that will be released in the very near future, then you may want to give this a try.
For more information about the rules, screenshots, to see the member list, discuss about this, and particularly to join in, visit the thread. Whether you join or not we hope you enjoy this: a classic Doom megawad with some extra goodies, from the community to the community, very soon.