I would like a platform for writing an academic paper where, as the sole author or a collaborator, produce a web version that people can read and comment on, but that will also produce good print copy. My favorite system is LaTeX, for many reasons. I ask for comments and give people PDF copies to comment on. However, none of them use LaTeX or understand how it works, often they want to use something like Track Changes. I think a wiki where everybody could either edit or comment would be great, but I would also want a LaTeX export option, especially for arXiv purposes. I would also like the LaTeX indexing features (e.g. references to equations, etc). I'd also like it to make me breakfast.