We want to be able to crowd-source the editing of questions and answers for the haggadah supplement. We can't just take questions "as-is"; among things, links won't work on paper, there may be answers that are somewhat repetitive, and we probably don't want to bring in comments. But we don't want the task to be too onerous either or it'll never get done.
In an answer I will offer a template that, if followed, should allow fairly straightforward transformation from Stack Exchange posts to publishable PDF. Just because I got here first doesn't mean mine is the best way, of course, so please propose other approaches in new answers. Vote up any answers whose instructions you would be willing to follow to submit material for the project. If it's too complicated, vote it down -- just because the poster thinks something is easy doesn't mean it is for everyone else! We have different levels of geekly comfort here. :-)
(Assume that there will be some other place to collect links that aren't yet developed into questions; this is just about the actual editing for publication.)
This question is about the mechanics of assembling the content. Once we have consensus on this, we'll open questions for each part of the haggadah where people can propose questions and answers following the process we decide on in this question. Then later, b"n, the editor of the final document will collect those posts into a single document and make a PDF.
Update: I can't accept the answer until tomorrow, but the answer below has up-votes and no down-votes and it has also been blessed by Jin, who is going to help us with assembly, so I'm calling that "good enough".