Creator of http://www.sharelatex.com here. LaTeX collaboration and environment setup is a big problem, online collaborative environments are going to become more popular. The more of them out there the better so good luck to jdleesmiller and writeLaTeX.

writeLaTeX has a nice split view which I have not implemented yet. The rate of update from collaborators seems to be relatively slow (compared to sharelatex). I would be interested in knowing the architecture behind the scenes.