Although the indications so far are that this is a tragic bad weather accident, the mind inevitably goes back to the loss of MH370 earlier in the year, of which no trace of wreckage has ever been found. AirAsia flight QZ8501 flying to Singapore with 162 passengers has not been heard of since requesting a change direction due to bad weather.
UPDATE 29.12.14 1237z: Indications suggest it crashed into the Java Sea. Tragic. There is a search and rescue mission in progress although hopes of finding any survivors are slim.
See http://www.bbc.co.uk/news/blogs-the-papers-30620761 .