Im trying to follow these instructions to get the latest updates on VB
but Im just getting error after error.

When I add the line

deb http://download.virtualbox.org/virtualbox/debian lucid contrib non-free

to the list and then add the key, it says
W: GPG error: http://download.virtualbox.org lucid Release: The following
signatures were invalid: BADSIG 54422A4B98AB5139 Oracle Corporation