[brundles]

One of the main differences to be aware of when flashing router firmware for different regions is the channels you'll get access to as different regions have different legal requirements.

Using an 802.11 router, US firmware will give you channels 1 to 11, European will give you 1 to 13 and Japanese (if I remember rightly) will give you channels 1 to 14.

Might not make much difference as usually you'll only use channels 1, 6 or 11 (remember that the router will use 3 channels either side of the one you select to get it's bandwidth) but it's worth remembering.