My Nook Color connects to a wireless router using 802.11n technology at 2.4 ghz, so I'm pretty sure the NC is capable of this.
I would recommend going through your router's connection settings (both LAN and wireless) to be sure that there is nothing hindering the connection. For example, some folks like the added security of setting up their router with their device's MAC addresses, so anything with a foreign MAC addy can't connect. You should probably disable MAC addy filtering if it's on, at least to get it connected initially.
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