Coming from the Twitter account of Sabarasa...
We've just submitted an updated version of Horizon Riders to Nintendo. This version replaces the tilt input with the analog stick!
We will have a big announcement regarding Protocol soon. Right now we can just confirm that we are working on the game!
Good to know that Protocol is still around. It could be one of WiiWare's last hurrahs! On top of that, Sabarasa has stated that a European release Horizon Riders' update is just around the corner. Thanks to Mike for the heads up!