Memigo (http://memigo.com) is a meta-blog like NewsIsFree, Syndic8, Blogdex, and Daypop. That is to say it feeds off of weblogs (e.g. slashdot) and news sources to provide headlines.

What distinguishes memigo from other weblog aggregators is it is intelligent. It uses the same system as amazon.com to personalise content (amazon recommends): Story ratings (implicit and explicit) are compared to how users like you have rated it. So, when memigo finds a new link, it gives it a rating based on its source, its referrals and its popularity among memigo users. You can also feed new links to memigo.

Registration is free and doesn't require an email address.