I'm SO hoping that they don't let Kermit and Piggy fall in love and become an item for 100% sure, because their distance-in-love is what has fueled them for so long...otherwise, I think if they DO become a certain item, then we're looking at the end of a story line that has weathered the ages since story telling began: unrequieted love.
After all Charlie Brown never really got to be with the Red Haired Girl, and that lasted 50 years.
Once in a while, to let emotions show, sure, let 'em kiss; but I hope it isn't permanent.
FOZ