My two cents.
So far I see no conclusive evidence that the aircraft last seen on primary radar 200 nm NW of Penang was actually MAS370. In addition, this would raise a lot of questions, for example why the aircraft had turned off its transponder and was NORDO and why it turned West.
At post
1835 I posted a report from a guy in Marang who claims a strong unusual noise was heard at 1:20 MTY on Marang beach, exactly the same time the aircraft was last seen on flightradar24 at N 6.38 E 103.46. The distance from Marang is 89.315 nm, however this report would deserve more attention, in my opinion.