This is interesting... Apparently we can expect wireless devices to be able to communicate directly (without an intervening router) as early as mid-2010.
Quote:
"Wi-Fi Direct represents a leap forward for our industry. Wi-Fi users worldwide will benefit from a single-technology solution to transfer content and share applications quickly and easily among devices, even when a Wi-Fi access point isn't available, said Wi-Fi Alliance executive director Edgar Figueroa."
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http://www.macrumors.com/2009/10/14/...ss-networking/