The Thai government's latest Board of Investment survey shows that foreign investors - especially those from Japan, Taiwan, Singapore and the United States - remain confident of Thailand's potential.  Although just under a fifth of organizations sent a questionnaire actually responded, 43 percent of those that did said they remained confident in Thailand's potential and indicated they would maintain their investment at the same level.  Meanwhile, 35 percent of respondents said they planned to expand their current investment in Thailand.  Four percent stated they were considering downsizing their businesses in Thailand or moving their ventures to another country.