While reading a bit about Intel offering new patches to plug holes in their Centrino wireless device drivers I stumbled across this description:

Intel has issued patches for flaws in its Centrino device drivers and ProSet management software that affect the security of the wireless products.

Three flaws are addressed with the updates. One could allow an attacker to break into a PC via Wi-Fi or even create a worm that jumps from one wireless-enabled laptop to another, provided the computers are within each other's range. Another security hole...

There is no such worm at this time but think of a mesh-networked wireless worm. Any busy airport would infect thousands of machines a day, many while still in their carry-on bags. A coffee shop in the valley would infect thousands more... Something to think about.

In the mean time if you'd like to patch your Centrino device, you can see if you are vulnerable here and get the 129MB complete driver install here.