Well for all the nay sayers Digital Spread Spectrum is now available and its not from a small outfit either [link]http://www.horizonhobby.com/Explore/Article.aspx?ArticleID=1389&Page=1[/link]

Check out Horizon's web page they now have it available for ground use currently and its a replacement module for the existing transmitter module with a new receiver.

Great price also:
3-Channel Surface System (include transmitter module & receiver) - $159.99
Additional 3-Channel receivers - $79.99

All I say is bring it on for the Aircraft,