It's a nice-looking site and the editors do a good job of choosing feeds to include. I like the Buzz! page, which aggregates the most popular items from many social news sites like Digg, Reddit, Del.icio.us, Furl, TailRank, etc. This is similar to other sites of this type, but they have a pretty comprehensive list here.
All in all, I prefer PopURLs and OriginalSignal, but my true preference will likely always be rolling my own.