Wow, when you said top-level post, I freaked and thought you meant main post for a sec. I had to go back and check into that again. Don't scare me like that :-)

For the other point, fair enough about the community comment, I update and take that back. Let me be more clear that a number of members of the community expressed a desire, which is why InIn took on the project of coordinating making t-shirts in the first place.

So your timeline is a bit off - people first expressed a desire, then InIn took on the project, then it was discussed quite a bit with Less Wrongers giving feedback on various phrases and design, then InIn made a first batch, then we got some more feedback, and now this is the first example of a second and more stylized batch. Thus, I do think it belongs on LW Discussion, not main, of course.