Has advertising but is free, its in pilot at the moment however should be available soon i guess you can sign up for the pilot now.
Laptops and ipads etc..
Users build their mobile broadband credit by selecting and viewing high quality advertising.
Nobody has ever offered something like Samba before, so if you want free mobile broadband, just sign up, and we will send you an exclusive invitation when a space appears.
Samba is founded by accomplished internet, mobile and advertising entrepreneurs from Orange, Digicel and Media Edge:CIA. It is funded by Irish telecoms entrepreneur Denis O'Brien.
Blatantly stolen from r2d25aa on MSE!