Earlier quoted context omitted.
Try Cain Able, its it probably the best ARP spoofing tool around for pc.
You don't need to ARP spoof on an open wireless network. But Cain is in my standard pentest toolset for various reasons, not just ARP spoofing.
Right... which is why he didn't mention wireless networks...
That's like saying, yes SQL injection is powerful, but it doesn't work on CSRF vulnerabilities -- complete non sequitur.