Very cool! Would it be possible to store beats and use some kind of autocomplete in a list below to compare popular user patterns?

Or why not try to import famous drum patterns using midi import or sound analysis? Would love to browse through Led Zeppeleins, for example, drum tracks visually! Next you could add piano roll and do the same for instruments. This might make it possible to search tracks by scales, chord progressions, melodies, motifs etc...