Recceguy, you've got it spot on! Same problem regaridng approval exists incidentally with mobile radios and vehicles under the EU Automotive Directive. Interesting problem for emergency services......
However, there's a two year old CAA report on the subject:
http://www.srg.caa.co.uk/news/gsm_intf.pdf
FWIW, my opinion is that right now, the only electronics that are useable by passengers at all times are pacemakers and hearing aids.
Anything else should be only used at the Captain's discretion. In the longer term, all the aircraft equipment should be suitably hardened - especially with stories like BEagles!