I added the Polymeme feed to the front page the other day. Polymeme was created by openDemocracy author Evgeny Morozov. It is Evgeny's own semi-automated news aggregator, and I had found myself selecting so many of Evgeny's stories in my "The World" entries that I eventually saw the web logic of this -- why not spread the energy and just give Polymeme its own slot.
Evgeny has built a database of a huge number of sites and blogs which he has categorised into broad subject areas. Every day, his machine discovers which stories are being referred to by several of these sites. He then does a manual cull for the most interesting ones. The result is a very interesting and distinctively personal selection of news stories.