Best. Birthday present. Ever.
I, of course, said yes. In addition to being super-interesting, I really love the process of peer review. I am still wondering how important the one-way anonymous aspect really is. And, I would really prefer if the reviewers comments were available alongside the paper, if it is accepted. There are some journals that do this, but it is far from common practice. In addition to giving some context, making reviewer comments available could also help get discussion going, on a website.
But, for now, I'll just be happy to participate in the process. Woot!!