I recieved this mailer from Thai Airways just now, so thought of sharing.

Greetings from THAI Airways - Mumbai Office

Minimum Funds Required To Enter Thailand:

We have been informed by Immigration Department, Bangkok that to be in line with the regulation imposed by the Ministry of Interior, Kingdom of Thailand, with immediate effect, all passengers arriving in Thailand must have sufficient funds as follows to show at the immigration before entry is permitted.

1. Transit Visa holder: Must hold minimum THB 10,000 per passenger or THB 20,000 per family.
2. Tourist Visa holder: Must hold minimum THB 20,000 per passenger or THB 40,000 per family.
3. Visa on Arrival: Must hold minimum THB 10,000 per passenger or THB 20,000 per family.
4. Non Immigrant Visa holder: Must hold minimum THB 20,000 per passenger or THB 40,000 per family.

The above funds may be held in any permitted currency.Kindly adhere to the above as insufficient funds on arrival could result in refusal to enter Thailand.