The World Championship Of Online Mahjong 2013 has now been announced and the tournament is now open for registration. Costs 33 dollars to participate. where 30 dollars go straightly to the pot to be devided amongst the winners. Last year WCOOM has arranged two tournaments with Hong Kong and Japanese rules. However this year the Hong Kong tournament was eliminated from the event. Possibly due to the low number of participants.
Much like 2012 event this year will get the winner a ticket to Macau (at most 1000 USD) and some pocket money and two days in a luxury hotel in Macau.
(the Japanese Site)