The point people seem to be missing is that a wireless SSID is only an ACCESS point to your network. You still connect to a backend router which assigns the IP address and such. You may have multiple wireless access points but all connect to the same network.
The new Airport Extreme and Time Capsule offers dual antennas so that they can offer TWO wireless access points in the same box.
The new Airport Extreme and Time Capsule offers dual antennas so that they can offer TWO wireless access points in the same box.