There is actually a release date for the OSTs for Birth By Sleep, 358/2 Days, and Re:coded
Taken from Wikipedia:
Kingdom Hearts Birth by Sleep & 358/2 Days Original Soundtrack is an upcoming three-disc compilation album containing music from the games Kingdom Hearts Birth by Sleep and Kingdom Hearts 358/2 Days, as well as Kingdom Hearts Re:coded, composed by Yoko Shimomura. It will be released on February 2, 2011.
I say it’s worth the wait.