Sony/BMG has a program called Platinum MusicPass which is suppose to debut at five retailers across Canada in late January.
Meanwhile, a bunch of smaller companies are offering this type of service directly to artists and indie labels. One company, Dropcards, now has their digital download sales recognized by Soundscan. Disc Revolt makes the case that the cards are a greener option than CDs. Fizz Kicks lets you print out your own cards.
Thanks to Dylan Cash and Digital Music News for some of this info.