There are no public documents, but if you work in the industry you can see it. Motorola made their decision for a reason. Many areas have simply become too crowded with 2.4GHz access points, not to mention 2.4GHz cordless phones. Why would you release a mass market phone that won't work across the mass market? Well yes there are few hotspots running 802.11A (more each year), but plenty of enterprise networks are switching to 802.11A and that is what Motorola is going for in the near term. The bottom line is that 802.11A has a future and 802.11B and G do not. There is nothing you can do to free up that spectrum.