Wait until the middle of the night to access the laptop as the theif will be able to see you moving the mouse around via LogMeIn. Go to town adding security software and such to track down your laptop, or just get annoying and do all you can to brick it. Set a password, require password to disable screen saver, require password on wake, turn on FileVault, etc.
If you get your laptop back or replace it, set a password on the laptop, make sure the laptop asks for the password on wake and for disabling the screen saver, and turn on FileVault to encrypt your home directory, and use CrashPlan or your cloud backup service of choice to backup your data. At least then if your laptop grows legs you're data won't be lost as well, and the theif can't access your files.