Okay, so maybe Google Docs still has a (sizable) market, but MonkeyTeX is probably worth knowing about if you are a TeX-nerd like myself 🙂
Essentially, MonkeyTeX allows you to edit, store, share and collaborate on LaTeX documents via a web interface. It supports BibTeX and Sty files, and can render to PDF. I’ve only played with it briefly, but it could be useful on occasions when I get stuck without a working LaTeX installation (such as internet cafes with only Windows machines) but would like to produce a professional looking document. It may be a nice way for people to test and learn LaTeX with minimal barriers to entry too.
Via thekit at LiveJournal