Are you aware of the type of data being carried around by your employees? Are your employees aware of company policy regarding the handling of customer data?
Only a decade ago, encrypting computer hard drives was a novel security idea; now it is practically required by compliance regulations. (And if it’s possible for someone to carry a PC out of your offices, consider encrypting the desktops’ hard drives too.)
Although few compliance requirements actually mandate the use of laptop encryption, it is definitely needed if laptops routinely carry sensitive payment card, health care, or financial data that fall under PCI DSS, HIPAA, GLBA and Federal Financial Institutions Examination Council security guidelines.