HeadingSouth,
why not supporting the phones that are already on board instead?
What do you call "supporting"?
I see two snags.
1. With cell phone and game console and computer add-on makers bringing out new models about every month, if not every week, a list of "approved" devices (which is what I assume you mean, correct me if I misunderstood) would be obsolete in six months.
2. While there are FCC standards for electronic devices, they assure at best they don't interfere too much with your television and automatic garage door opener.
So far as I know, there are NO standards in existence against which you could certify a PED as being approved for use on board an aircraft.