Article: http://yahoo.businessweek.com/technology/content/aug2006/tc20060803_264406.htm
And a Video demonstration of the exploit: http://news.com.com/1606-2_3-6101573.html?tag=ne.vid
FWIW, this was an Atheros driver that was exploited. I hope that Mikrotik looks into this as it’s possible on Windows, Mac, and Linux…not good 
This really sparked some interesting conversations yesterday tho 