I told Edwin he could post his survey here but asked him to not bump the topic. So here's a little bumpity bump in case people didn't notice it.

Umikuma wrote:

Sounds like Lang-8.com

This, sounds exactly like Lang-8.com.

Google allows for users to augment translations, doesn't it? I always see that 'suggest a better translation' link.

I have received great feedback already, very informative.

The reason why I'm passionate about this is because of the potential. But to actually  crack the code and go from 'gimmicky' to 'useful' is much harder than I initially thought.

For example, yes, credits / tokens are meant to counter possible abuse. But it's clear that it could lead to alienating users as well. Someone mentioned that a website that forces the use of credits shows an inherent distrust in its users, which is also something that has to be taken into account.

@toberroth, umikuma : it's a cross between lang-8.com and cucumis.org as I discovered later. As Fabrice said, market research will be key to advance.. if we can't do it better than it's not worth it.
@nest0r : yes, they use it to improve their machine translation system, but it's still machine translation and there's no social component
@IceCream : I agree that it's worth to try and see whether it sticks. And great comments about slangy versions

The more time passes the more my respect grows for people like Fabrice who actually manage to create something useful from scratch!