10.45 pm Sat nite.

We have a DVD stuck in a MacBook.  The disk won't eject, dragging it to 
the trash brings up a dialog box suggesting quitting applications - but 
as far as I can tell nothing besides the Finder is running.  I have only 
just started using OS X.

The machine won't restart, shut down or log out.  The physical switch on 
the machine also won't work.

Anyone have any ideas?  

Bill Chesnutt