I realize this thread has been dead for a while but it is still one of the first hits when searching for “Sriracha Hechsher.” I am happy to report that the Rabbinical Council of California (listed on CRC website) has certified Huy Fong Sriracha Hot Chili Sauce as Kosher Pareve through June 30, 2014. I’m not sure if posting links works in this forum, but if you search “RCC Sriracha” the relevant Teudah should be the first hit.
Happy hot saucing!