Aggregating RoR blog to another blog...

I just found through a Google search today that john wang from http://planetmvc.org/ is aggregating all of the blog posts written here to his own blog, which is a collaboration of mvc and rails related blogs. These aggregating blogs seem to be popular these days and i've seen a few popping up all over as of late! John's is different from rubycorner.com who allows you to submit your site to their aggregators and displays the more recently updated pages, a concept that I think is a bit more forthright. Now, i'm aware of the motto going around that goes, "If you have your site on a feed, you're consenting it to be aggregated" and I agree with it, to a point. I do appreciate the John isn't ripping content and claiming it to be his own and is at least putting the person he's taken it from in a link above the posts, kudos to you for that John. It is an interesting growing phenomena though and if you want to take a look at the example, check out the planetMVC site and see what it's all about.