I'm not sure this solves any particular problem that I have, but there are enough interesting ideas here (like the lightweight form generation) that I think are worth looking at. Definitely not just a clone of Sinatra or web.py.
I agree, I'm a huge Sinatra fan and was coming in here to rail against somebody reinventing the wheel, but I see some value in the magic form generation and the baked in, but lightweight marshalling. Seems like it would be handy for a "hey, fill in this form for me" type page....
Some interesting ideas, and I love the conciseness, but..:
[:title_x60, :text_60x10]
.. made me throw up in my mouth a bit. I like some of the ideas but this is the sort of janky Ruby that unfairly makes other people go "See, this is why Ruby sucks." Nothing that couldn't be cleaned up, of course :)