I joined the happy room academy at the corporate office. if you make your room awesome enough, they will put it on display.
as far as i can tell, there aren't many changes to the game as far as your main town goes (although i've never really played older versions, adam has). the new stuff is going to the city. there are a few stores, a theater, and some secret store that i haven't been to yet but you have to find a member from your town and get an invite (which i got). the major perk is being able to add friends and go and visit their towns, catch their fish and take their fruits to plant new trees in your town. people can also ome visit your town. the town stores are the same: old man nook's store and the place where you can buy/make/sell clothes.
the wiispeak part is apparently a mic that goes on your tv with the remote sensor. it captures the conversations of the entire room. i didn't get this, i don't want to hear other people blab while i fish!