I bought a Linksys router WRT610N v2 and I installed DD-WRT build 14896 preSP2 on it.
I bought a Linksys Dual Bank Wireless N adapter for my laptop.
I have no idea how to configure the router for dual channel.
It seems that I have two different wireless devices that I can give them different SSID names and different wireless encryption settings.
I tried giving them both the same name, same encryption and same password, but when I try to connect I see that I'm on 140MHz speed and not 300, so I'm probably missing something.