Photos of the promotion at Bondi Beach, showing the VW-Boombox that Trunks mentioned above, along with someone in a Bumblebee costume... and lots of cassettes for people to help themselves to. (link to original article here by Transformers fan Jason Murray)


And it has been confirmed that the cassette is blank, but has a link to this special "Bumblebee" playlist on Spotify that has 48 songs from the 1980s.
Or, create your own playlist on the Bumblebee Rewind page at Spotify.