Technical Challenge - Resurrecting CR 2.0 Blog with User-Generated Bookmarks

I'd like to resurrect the Classroom 2.0 blog (see the "News" tab at the top of the network) by having a daily post of links related to news and sites around the topic of Web 2.0 / collaborative technologies in education. As part of this, I'd like anyone to be able to use one of the social bookmarking sites to tag a site/URL with a common tag (say, "cr20blog") and then aggregate those feeds and have them post to the blog.

I think this would be a great way to have the community collaborate--not only would the daily blog post be informative, but the social bookmarking repositories based on those tags would also be a good reference.

There are a couple of services that would aggregate the feeds from the social bookmarking sites into one feed, but I'm left with two challenges: 1. Editing out duplicate or inappropriate entries, and 2. Automating the posting of the feed information into a daily blog.

I know that Diigo has a feature for daily blog posting--is anyone aware of something more universal, or a way to use Diigo's feature to include the feeds from the other social bookmarking services?

Any thought from the CR 2.0 brain-trust?