Apparently hackers are going after other system drivers - although the Wi-Fi hack is still one of the more frightening applications.
Your sound, video, and network card drivers are among the next big targets. Not only that, other software agents that are frequently ignored, often unused, but generally running on a default system installation have become the focus of malware developers for the next generation of spyware, rootkits and viruses.
This is why I so often tell people to turn off unused services. Black Vipers site (mirror - his main site appears to be down) has excellent coverage of that topic.