I'm in, too. We did a whole lot of decluttering Saturday, and the kids are going to do a mini yard sale on Saturday (and keep what they make), so that's inspiring them to purge, too.
I like the idea, because it means I don't have to sit out there all day, I can just kind of keep an eye but let it be their project.
So we've done way more than 7 days' worth, but I will do this to stay on top of it. There is still so much to get rid of, this was just a way to get started.