There aren't any Internet Cafes (in the traditional sense) onsite.
They do have internet telephone kiosks in the resorts and parks, but they do not have printers. I guess you could go to the Contemporary or another hotel that has a business center if you need internet and printer access. However it is pretty expensive. I recall reading that they charged in 15 minute increments, but it figures I can't recall where I read that. LOL. Not sure if is worth the running around/expense (depending on where you are staying) to save a few minutes wait time at MCO.