SkypeWireless over WiFi is only good if there is enough bandwidth in place. At 50k in both direction, and with others in the hotspot sucking down bandwidth the user experience won’t be perfect all the time.
But that said, I expect this and WiMax to disrupt the market.
Skype Bits and Bytes
Per Skype’s knowledgebase, Skype consumes up to 4 kb/s while idle and between 24kb/s and 128 kb/s during an active call.