One measure of just how important the Beatles were is the amount of material that is available. We have the big Anthology and associated CDs of early and alternate versions of a lot of songs. We have books on their equipment and even one that recounts what they did every single day they were together as a group. But today I ran across something particularly interesting: a clip of just the vocal tracks of the side two medley from Abbey Road.
UPDATE: The original link seems to have gone astray so I can't embed, but this link should take you to the clip: