An informational meeting held in Twin Falls yesterday for the Chobani yogurt factory currently under construction  got about twice as many  attendees than officials were expecting.  Officials fielded some questions about the new plant from those attending but still remained tight lipped about some of the details, saying that they wanted to keep some of the thunder for the actual opening this summer.  Chobani officials say they will be hiring about 350 employees to work at the plant when it opens this summer at its site between Twin Falls and Kimberly.  The Times News says Chobani officials were expecting under 50 people to attend the meeting but an estimated crowd of about a hundred actually showed up.