technically no. but many international flights now have WiFi 802.11 service. i have tried to log on, but they use that webpage logon method.

if wireless was an issue i think this would not be possible.

@mud: thanks... 

@gundam: 2molo! 

@neogeocdz: playing DS in flight no problem... I does that all the time (once from KL to Siam Reap - 3hrs on TETRIS!!!  )... but wireless... perhaps need to ask. 

I asked before, the told me CD player cannot use on board a flight.

so.

no.

This was ages ago. if you look thru MAS in-flight stuff you may still see this on the list.

My say on the matter is such:
I think it more likely for a flock of geese to crash a plane than Wifi signals. That being said, if you wanna feel safe, ask the crew. If the plane has its own wifi network point , its a moot question to ask.