I think as far as the Touch Pro radio goes, no2chem has probaby uncovered the most useful information about it. His last post on the FM was here...
http://www.nuerom.com/BlogEngine/pos...-FM-Radio.aspx
His prior post does point out that the Bluetooth chipset supports FM radio as well, just like it does on the Diamond.
It looks like it's still possible, but not something we'll see very soon.