Yep. 130 is 2x2 MIMO with 20MHz channels. Unlike past WiFi specs, it looks like the formal spec this time was a bit more forward thinking, avoiding the mess of "Super G" and other vendor proprietary speed extensions. N should be able to grow up to about 600MBit officially. The current generation Macs and Airport Extremes sit in the 450MBit range.
Quote:
The third mechanism to increase speed is an option to use "wide channels." 40MHz rather than 20MHz channels allow for 108 subcarriers, which brings the bitrate to 270Mbps with 2x2 MIMO (two antennas used by the sender and and two antennas used by the receiver). Optionally, the guard interval can be reduced from 800 to 400 nanoseconds, adding another 10 percent speed increase, bringing the total bitrate to 300Mbps for 2x2 MIMO, 450Mbps for 3x3 MIMO, and 600Mbps for 4x4 MIMO. However, as the 2.4GHz band is already very crowded, some vendors only implement wide channels in the 5GHz band.