The new commenting interface seems to be headed toward the livejournal model, where commenters are either members of Blogger and post under their username, or must post as "Anonymous." I have never liked this, since I don't think it's fair that blog-less friends, Movable Type users, etc. should have to suffer the indignity of being known as "anonymous." The YACCS model allows anyone to enter contact info in on the fly, which is more democratic.
On another note, I also turned on the new "post by e-mail" feature, which sounds pretty cool. If this works, it means I should be able to blast out blog entries from my SmartPhone. (I've tried to do this before in other ways, but it's never been very reliable.) I'll give it a try in a bit.