So, it would be ironic if, after the investigation, they determine that some guy who was Twittering during take off interfered with the planes systems and caused the crash.
http://www.wired.com/techbiz/media/news/2001/02/41273
http://en.wikipedia.org/wiki/Mobile_phones_on_aircraft#Elect...
The reason it is unlikely is because the systems are shielded but you could for see a situation where shoddy maintenance leads to the degradation or removal of what ever is shielding the instrument.