move data to cache topic

Would it be possible to move some user data (emails etc.) to /cache partition? I have only 14 MB used. It seems also that the dalvik cache is stored somewhere else. I wonder why the /cache partition is not used to the purpose it should be.

Found threads like these: http://forum.xda-developers.com/show....php?t=1174160 http://forum.xda-developers.com/showthread.php?t=748053