Supposedly you can make a to-do, share the to-do and they can respond back with one button that they received the to-do.
Doesn't work yet.
I did get it to send one to-do (share) but that to-do's confirmation button was dead.
Now I can't even "share" the to-do. I tried it on an iPad and an iPhone.
It is new however, and the interface is clean and easy to use.
They need to start a user group/forum to get people involved as well.