I imagine that you’ve already finished this policy, but I have a couple of pointers that I hope are not “too little, too late”.
My first question is simple, do you have a remote access VPN that your users will be logging into? If you have some sort of secure VPN, then wireless access is not far different from Internet access. You should be sure that the laptops have firewalls enabled. Also, it’s good to have one time use passwords in case someone is spoofing an AP.
Also, if you have sensitive information on the Laptops, you might consider a service that either deletes the data when the device is stolen or lost, or encrypts it.