How to Import mailbox from Outlook 2011 into Mac Mail Lion


how do you import your mailboxes from outlook 2011 into the Mail application within Mac OS X Lion?

I only see Entourage in the list of options to import a mailbox. Why has it not been updated to import from Outlook 2011? And how do you do it?

I have Mac book air and OS X Lion (10.7). Glad If you could help.