This could be useful, but I only imagine spreadsheet-people using this kind of canvas, people who would enjoy your app, but would never find it in the internet.

This is a problem many things face.

I'm genuinely asking, do you know the Business Model Canvas? See http://www.businessmodelgeneration.com/canvas.

excuse the newbie question, but what other "kind" of canvases are there? Or do you just mean print/web?

I mean these formularies people use to write their business model, online or printed.