If you're interested in checking out the progress, the build process[0] is really easy.

Here's the current page: http://i.imgur.com/NmRNaRz.png

If you want to poke around more, servo shell[1] lets you switch starting pages without having to re-run from the command line.

[0] https://github.com/servo/servo [1] https://github.com/glennw/servo-shell