I looked around because I was curious as well. Dalton Ross reported in a new article on EW.com, regarding how the hidden immunity idols will work this season.
"The way hidden immunity idols are played will also be different in season 24. This time, there will be two idols hidden at the camp ó one for each tribe ó but finding your tribeís idol does not guarantee your safety. Instead, as Probst explains, ďWhen you find the idol, you canít use it for yourself. You have to give it to someone from the other tribe.Ē The trick will be picking the right person to give it to, and perhaps getting concessions in return ó not to mention lobbying for the other teamís idol once someone finds it."