EDIT: The contest is now over. A special thanks to all the participants. You can see the results here and the levels here.

So, continuing the discussion from here, here's what I'm thinking:

1. If we could get all four of you guys to participate, that'd be awesome. The more participants, the better. (The four who have expressed interest so far are puggsoy, MyGod, kirdneh, and goo23. Post below if you're interested in joining also)

2. The levels will be Little Inferno themed! Betcha didn't see that one coming. Based off what little descriptions and reviews we have so far, what do you think the game would be like if it were a World of Goo level? Feel free to use a screenshot or two from the video Tomorrow Corporation released; be creative and all that. Ideally, I'd have you guys use "Reporting from the Weather Balloon" from the Little Inferno soundtrack, but that's only available for people who've preordered, so that kind of defeats the point. XD Ah, well. If you do create your own artwork/music, try to imitate Kyle Gabler's style. Or rip sprites from the images on tomorrowcorporation.com (I think that's legal, right?). Uncle Sam Goo Balls, anyone?

3. Blind study. What I mean by this is that I don't want to know who submitted what level. I'm not 100% sure how the logistics of this will work, but I'll need another moderator to be the mediator between me and the players. And by "Another moderator", that pretty much only leaves puggsoy or Albino Pokey.
3a. What I'll want is for everyone to submit their level with the addin name (On goofans) set to "LI LCC" or similar. Goofans will complain about not being able to create an alias if people submit different levels with the same names, so you'll need to rename yours "LI LCC 2", "LI LCC 1337", whatever. Just number it, don't give it a name. That way, when an email appears in my inbox, I'll see "MyGod has requested publish for LI LCC 42" and I'll know to ignore it. This leads me to:
3b. I'll need the appointed moderator to gather all the addins onto one temporary download page for me (i.e. create an empty addin page and add all goomods to it, so I can download all at once). Needless to say, your name MUST NOT be in the addin ID, the addin filename, or inside the addin.xml. I'll need this appointed moderator to double-check this for me.
3c. Please don't name your level "Little Inferno." Avoid name conflicts. I don't want levels overwriting each other. But do give your level a meaningful name, so I can tell them apart.
3d. I'll want to be able to install all the levels and play them all without having any idea who created which level, so I'll be critiquing on the basis of which level has good level design rather than "kirdneh is awesome so I'll give the game to him". So don't put your name in the level or addin anyplace. The aforementioned appointed moderator will keep track of who created which level, and will let me know who created the winning level.
3e. Ideally, aforementioned appointed moderator will playtest levels beforehand, so I don't have to worry about levels being broken or not working. But this will depend on their time constraints.
3f. Since I'll need to email the Little Inferno Preorder key to the winner, put your preferred email address on your level page, for the aforementioned moderator to give to me so I can email you if you win.

4. No signposts. This is for a couple of reasons. First of all, I've played enough levels that I can distinguish people's writing styles, at least to some extent. Also, as discussed in the latest interview, Little Inferno won't have a Sign Painter. So no text or signs of any sort.

5. Polish, polish, polish. I prefer short, awesomely cool, polished levels that I can beat in a minute or two, like the original levels. That's not to say that I'd necessarily beat it in a few seconds on the first try, but if you know exactly how to beat the level, and it takes you more than a minute or two, it's probably too long. Little Inferno will be short and polished, from what we've gathered so far, so make some really cool short and polished levels! Try to think how Kyle Gabler's twisted mind works when making the levels, and imitate as best as you can. Don't throw together a level in a day and call it done. Play it a gazillion times, smooth out stuff that annoys you (even if it's only a minor annoyance), spend hours on it. Play the original levels to get a feel for just how polished the original game is. Above all, make your level fun!

6. Judging. Hopefully I'll get the levels judged within a week or two after submissions close. I'll play each level thoroughly and critique level design, writing a paragraph or so per level explaining what's good level design in said level, what should have been avoided, etc, as objectively as I can. Then, I'll choose a winner, and the appointed moderator can tell me who made what level, and I'll make my final writeup. All submissions will be published for everyone to browse, and the Little Inferno preorder key will be emailed to the the winner.

7. Deadline? I'm not sure. Definitely before Little Inferno releases this winter, since that would defeat the purpose. Discuss!

Anything else I didn't think of? Any comments/questions/suggestions? Post below.