By wireless traffic, do you mean Wifi ?
If you want to sniff traffic from your own machine's wifi card, then no problem - just disable promisc mode on Unsniff. In this mode, it cannot look at management frames, beacons, etc.
If you want to sniff traffic off the air, then you need an adapter like AirPcap. You can see all the management frames in this mode. We are in the process of testing with Airpcap, it should be available after Dec 15th.
Unsniff can read capture files containing wifi traffic.
Vivek