Yes! it was announced on the official website of K-ON! that the release of the Two new songs for the new season is going to be on April 28, 2010.
Also the new Season starts on April 16, 2010 (Friday) at 10:30 and will be broadcasting Weekly every Friday after the Premiere.
To give a bit of information of K-ON! to refresh our mind....
"K-On! (けいおん! Keion!?) is a Japanese four-panel comic strip manga written and illustrated by Kakifly. The manga started serialization in Houbunsha's seinen manga magazine Manga Time Kirara since the May 2007 issue, and also started a bimonthly serialization in Houbunsha's magazine Manga Time Kirara Carat since the October 2008 issue. "
so for more information, Pls. visit the official website...