Unfortunately, they don't mark which are new and which aren't, but I believe /incoming is a new one. I've never tried out /sing or /ding. and /doh looks new to me as well. But odds are that there are at least a few you haven't tried yet, and we do know that lots of the animations are new for sure.
So get in there and try out some emoting -- if there's an especially funny one you find, let us know for sure.
Update: Commenter Jason M. nabbed this cache of the page from the Wayback machine so we can see what's old and new for sure. Thanks!