Yeah, anyone who contributed (in terms of at least one level, not already posted here and at least one secret, not already posted here) will get the quest. I'll look through the thread, and then if I missed anyone they can comment on my profile and I'll double check here.
I haven't given out the quests yet, if anyone wanted to know.
48 is located on the top right corner of each level to the left of the sound (this is the other one that Clinoman found on accident). Still need 2 more