According to the 13AM Games twitter page, Runbow has been sent into Nintendo for certification. This step is usually one of the final ones before the games release date.
Runbow was announced at E3 to have a single player adventure mode, as well as online multiplayer. It was also part of the Nindies@Home promotion, which meant if you downloaded the demo around E3 you'll get a 15% discount at launch.
Who else is excited for the nine player party platformer?