Sorry to hear about your theft.
It it possible to track/recover but alot depends on what software/features you have activated and that the thief dosen't notice till too late. If you do have specialised 3rd party tracking features then contact the company involved fast.
Of course, you'll have contacted the police, etc - they might help you (long shot, though). Are you covered by insurance? Do you have backups of both machines?
They might not need to break any password to use them (e.g. format).
I remember recently about the stolen iphone story on a cruise ship - the owner had the photo stream feature on, the thief didn't notice and all his 'victory' photos (including mug shots!) were uploaded automatically to the owner, who quickly contacted the police & ship owner. Hope you have the same success!