To add to Bodine's message:
You'll never see anywhere near 108. Chances are you won't even see 54.
The "super" protocols use the entire 2.4 spectrum .... meaning that *any* other users in your neighborhood, on any channel, will interfere with (and be interfered by) your system.
The signaling rate on all of the wireless systems is not the data transfer rate. On 802.11b, you're usually good to get ~5 Mbps, on 802.11g, it falls in somewhere around 22 mbps, and Super g, in an area with outher users, probably less than that.
Super G was included in the 802.11g spec because the committee couldn't get enough votes to remove it. At that point, it became a sales & marketing tool and nothing more.
FWIW
Scott