Hi James,
Many thanks for developping and sharing such a tool, that certainly may be very helpful. I've been trying it, using the sandbox. I suppose that pages of registered users behave similarly.
Concerning the interface, it is quite intuitive and easy to use. I miss, however, a "download" button to back-up tex files. Likewise, there is no way to see files that are really there, as, for example, the log or aux files generated after a LaTeX run. Or a file created by a filecontents environment, which, by the way, cannot be accessed by other tex file in the same category.
There are no tools for debugging code. The log file is not shown unless the pdf file cannot be created. So, a priori, warning and even errors may remain hidden to an unexperienced user. Of course, one can always force an error (by simply commenting \end{document}) and get the log file, but this is not a friendly way of working. Likewise, the code lines are not numbered and there is no "search" button (that of the browser looks only on the frame, not the edit window). Therefore, for large tex files, it may be difficult to move up and down, move to a given line, find the right command...
There are many other possible improvements: syntax coloring, command and symbol palettes, etc. However, I think that the above cited problems (back-up and debugging) are more urgent. If you can solve them, ScribTex can become an important, useful on-line tool. It is fantastic to have at hand, anywhere, a full TeX Live system!
