Thanks to running scientist who publish a whole list of 2011 Marathon in Asia and Australia, here is my wish list.
http://runningscientist.blogspot.com/2011/01/2011-marathons-in-asia-and-australia.html
Registered
1. Borneo International Marathon - 1/May/2011
2. Singapore Sundown Marathon - 28/May/2011
3. Standard Chartered Kuala Lumpur Marathon - 26/June/2011
Wish
1. City to Surf Marathon, Perth, Australia - 28/Aug/2011
http://citytosurf.activ.asn.au/
2. Chiangmai Marathon, Chiang Mai, Thailand - 25/Dec/2011
http://www.chiangmaimarathon.com/