Sounds interesting. I went digging through your links to see exactly what comprises a "one-page dungeon" and there's a lot of reading there. I'll warrant you'll get a better response from contest entrants if you post a concise description of what the finished entry should be. Hope this works out.
I reckon I made a lot of one-page dungeons in my time...before I got delusions of grandeur and started trying to design whole worlds, mega-dungeons, and adventure paths.