@ww woah, this is a really neat project
i currently use nanoc for my static generator, but i think being able to do server side rendering would really come in handy
primary idea coming to mind is a photo gallery where images can just be dumped into a folder and it does the thing (i know those exist, but most are too complicated for my liking and i wouldn't be able to hack on them all that well...)
helps a lot that ruby is, to me, a lot more comfy than php
though, you should totally pick up some ruby, it honestly feels like i can write pseudocode most of the time and it'll work anyway :p