This is something George (no...i`m not spelling the last name) on "The Hour" came up with 2 weeks ago. Great idea...but this had been going on years ago with some friends of mine.
George wants to go wild on this...and track it. Do it...report in to his site, and be real...stuff you really like...and think others may have never heard.
http://www.cbc.ca/thehour/blog/2008/11/_operation_disc_drop_how_it_wo.html
Operation Disc Drop - How it Works
There's nothing more satisfying than sharing the joy of music. Disc Drop is your chance to turn a total stranger on to the tunes that changed your life. Who knows? Maybe you'll change some-one else's life while you're at it.
STEP 1: Make a mixed CD of your favourite tunes. Somewhere on the disc write: "DISC DROP - cbc.ca/thehour"
Be sure to include a track-listing so people can track down more music by the artists on your disc.
STEP 2: Drop off your disc in a random public place.
STEP 3: Go to the "I Dropped a Disc - What Now", click on the comments, and write down where you dropped off your disc and the track-listing. Check back later to find out who picked it up, and where it's heading next.