Security over wireless networks continues to be an issue and yet is an increasingly important part of overall network security. Over the past few years, wireless security has made some great strides and companies need to be aware of the best techniques for securing their wireless networks. Generally that boils down to using WPA2, rather than its forebears - WEP and WPA. For some reason a lot of people are not aware of the significant improvements brought about by WPA2. Here's a great overview of he issue.