freetos@swordfish:~$ sudo aptitude install virtualbox-ose virtualbox-ose-modules-`uname -r`
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Initializing package states... Done
Writing extended state information... Done
Couldn't find any package whose name or description matched "virtualbox-ose-modules-2.6.27-7-generic"
Couldn't find any package whose name or description matched "virtualbox-ose-modules-2.6.27-7-generic"
The following NEW packages will be installed:
  dkms{a} fakeroot{a} patch{a} virtualbox-ose virtualbox-ose-source{a} 
0 packages upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 6882kB of archives. After unpacking 24.4MB will be used.