I have an idea but I'm not entirely sure if it is allowed in this contest:

A web browser programmed in Lite-C that downloads htmls and interprets them as would a normal browser. The TWIST is that it does interesting things with the content such as displaying it in 3D or animating it. It would also use special tags ignored by other browsers to allow pages that can be 3D environments/levels defined in an HTML-like fashion.

Would I be allowed to
a) Download HTMLs
b) Download models and compiled levels
c) Use a DLL for which I don't have the source or did not create myself? (like GSTNet or the webaccess plugin)