IGN reports that Nintendo of Australia released some big news about two upcoming Wii titles at its media summit. Metroid: Other Mand Super Mario Galaxy 2will be released between June and August. Other M was previously named as a summer release by Nintendo of Japan, but Galaxy has only ever been specified as "2010."
Those dates are presumably for Australia, but at least set a rough time frame for the rest of the world. We'll find out more tomorrow during Nintendo's US media summit.
Nintendo Australia also dated the black Wii console (March 11) and the DSi XL (April 15, in burgundy and bronze).