A better answer is "not currently" but I spoke with a Sr. iPhone Engineer who assured me this will be addressed and hopefully in the first update. He admited it was a huge oversight on Apple's part but they did not realize how wide spread 802.1X authetication was. In fact, it took an hour to escalate me through a series of levels to a person that even knew what it was and he readily admitted the iPhone "should have probably supported it out of the box" since OS X does as well as every Windows machine and wi-fi enabled smartphone/pda.