The 15% is being offered by CMSC (
Cambodia Mutual Savings and Credit Network) and it is a 12 month term deposit account and the 15% is offered on the Reil.
They are also offering 12% on the $ for 12 month deposits!
I know nothing about them, although have for years driven past their Olympic branch, saw a sign advertising 15% remembered this thread and popped in yesterday.
Here's their website
http://www.cmscnetwork.com/.
I have no ready cash to open an account (All my savings are in AMK
http://www.amkcambodia.com/ 16 months left of their 18mth term 12% KHR account and my dollars are in Amret
http://www.amret.com.kh/....both of whom I researched before opening the accounts and feel pretty safe about)
Just thought I post to let you guys know that CMSC is where the 15% is.
FYI the deal runs out on the 4th of December so move quick if you fancy the risk.