Channel bonding, using two frequency sets, say channel 1 and 6 (non overlapping channels) + compression for the straight Turbo G mode. That's the mode you'll see the biggest performance gains. Start mixing in the other modes and you'll see speed hits accordingly. Not really a great solution considering interference is already a concern for many WLAN's. Broadcom has a chipset, perhaps coming out this year, that they are claming 125 Mbps signalling rate, and 70 Mbps raw throughput under optimal conditions. This without channel bonding. We'll see but it looks promising. For the stuff you can get now Jack's link gives some healthy numbers for current wireless performance, even at distance.