Valve have gone and announced the release of Portal 2's soundtrack in a three part musical bundle entitled 'Songs To Test By', for absolutely free. Mike Morasky's mechanical masterpiece provided a cracking backdrop for the events of Portal 2 - and were procedurally-generated in the game too, though it's doubtful the soundtrack itself will adapt to your own actual daily life.
A typically chuckle-worthy release on the official game's blog had this to say:
'Whether you're a mega-science corporation with decades of test experience, or a young start-up liberating your first test subject from non-testing with a chloroform-soaked rag, Aperture guarantees results. Wake up your test subject, open the chamber door, and press play--let Aperture's patent-pending rhythmic compliance enhancers do the rest.'
Releasing in three volumes, the first 22-track instalment is available for download right now, though no 'Still Alive'. You'll have to shake out Rock Band for your Coulton-fix.