Popurls, the classic overview, quite popular
Alltop is like Popurls but for many topics, check out SEO on Alltop to test it
JimmyR sports a quite advanced tabbed interface and supports different media types
THEWEBLIST, nice design, Popurls functionality
Original Signal, best of Web 2.0
SEOmash, the only SEO news source you need ;-)
Qoogle, japanese Popurls version, I love to click stuff where I have no clue what it is (similar to StumbleUpon in a way)
fichey, incredible service that simplifies your online experience by showing every link in a linear way, can’t explain it, you have to try it yourself
I See News is a collection of global news sources minus the usual suspects (No CNN, BBC etc.)