I'm stunned by these new boards annoucements for Arduino & Audio :
1 - Leonardo: Say hello to a new level for us Midi equipment makers. No doubt that in the very near future the capability of the board to be USB-modded will lead to us being able to make our own USB powered midi interfaces, w/o having to purchase a FTI programmer and re-burn the board like we have to do on our regular boards. That's AWESOME !
2 - DUE Say hello to horsepower ! 32 bits @ 95Mhz computation will deliver us audio enthusiasts brand new capabilities to dig into embedded audio synthesis. We'll eventually be able to sample audio at high rate and have CPU headroom to do complex filtering w/o remorse :)
I'm very excited about those noew products, can't wait to have some in my little hands!