Nano Assault is a new 3DS shooter from Shin'en, the developer behind the decent Nanostray shooters on DS, and it will be out on December 1 in US.
Unlike the fairly traditional nature of Nanostray, Nano Assault features a combination of Starfox-style 3D levels and top-down levels that have you skipping between rounded entities like Super Mario Galaxy - and it looks pretty cool, as you can see in the trailer below.
It's December 1 release is a slight delay on the original plan to launch it last week. Confirmation of the new date comes from the game's official site, which specifies the US region. There's no word on its release elsewhere.