Thai Keyboard for iOS 4 is available but only for 3 rows. We have researched for awhile and have not found a 4 row keyboard anywhere online. Since Khmer Keyboard for iOS 4 has been available for awhile now, we thought the Thai keyboard 4 row would be possible as well. The same iOS4 Khmer Keyboard developer, Mr. Fab has made this possible. Were the first to tested it out and it works perfectly. The keyboard iOS 4 for Thai language should be available soon on Cydia.
Now available on Cydia.