From memory you can add the Iranian Air Force 747 which crashed on approach to Madrid and a Peruvian L188 Electra to the list of aircraft lost following an explosion in the ullage following a lightning strike and I'm sure there must be others. I also seem to remember a Brasilia or some other similar comuter type being lost in Belgium (?) after it lost its electrics following a lightning strike. However, I think it is purely speculation that a lightning strike has had anything to do with this accident. The reports of severe turbulence might be a more interesting area for speculation.