I've heard the pinging and although annoying, it's not really what I'd call interference. I've gone over the accident report and although the possibility of electromagnetic interference is mentioned, I think the analysis makes it very clear that it wasn't considered a contributing factor.
I went ahead and wrote my blog piece:
Fear of Landing Phones Interfering with Flight
Feel free to point out any errors / embarrass me publicly / beat me with a wet noodle if I messed any of the details up but I think it all looked straight-forward despite my lack of IFR experience.