Basically, you make a tape with whatever you want, excluding Sonic Youth because we all listen to them anyway, you send the tape to Pookie in England, and then he randomly sends them to the other people who took part. So your tape could come from various parts around the globe, and yours goes to some mystery location too.
After you recieve the tape you post a review here.
Send a PM Pookies way and he will explain.
Some stuff from Brazil that some of us may have never heard would be very welcome. At least from this poster.