I would suggest forcing the SSL across the board. I know, I know, I can type it in BUT it is just nice to have the little things work all on their own, even when I am logging in.
This is pretty damn rad. Personally, I would love to see an extension of this with a "pop-quiz" module that asks 3-5 questions with multiple choice answer. Think, text-books.
Congratulations on your development. It seems this has been done before, and albeit it is neat what is the benefit over a low-cost "standard" webhost? I can name a few webhosts that are in the $3-5 range and offer standard tools and the ability to install a SSL.
The benefit is that you don't have to connect to your webhost over FTP and change files, instead you could just open your file from your dropbox edit it and be done with it. And to create a website all you need to do is create a folder and put your html into it.
Thanks for the feedback :)
I would love to hear about features which might make you consider this service.