Adventures in Capturing Wireless Packets
Just a quick FYI for those *true* WiFi packet analysis junkies out there – I installed OmniPeek Professional 5.1.4 on my HP 6910 laptop. The software “works” with embedded Intel wireless NIC, but reports invalid data rates for 802.11n traffic.
The work around that I came too was to purchase a 3rd party, dual-band 802.11n USB adapter that has a supported API within the OmniPeek software.
I also have an AirPcap Nx device from CACE Technologies that I like *very* much – USB form factor that allows for wireless packet capture in Windows. AirPcap integrates directly into Wireshark, which is nice since I “grew up” taking wireless captures in Lib PCAP format under Linux and looking at them in Ethereal.
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WiFi Jedi.com 
You could also try NetworkMiner, which is an open source forensic tool for Windows. NetworkMiner will extract files that are sniffed with your AirPcap adapter.