RSS + ENT aggregator
The folks at eVectors have an RSS+ENT aggregator that aggregates news and lets you filter it by topic.
Here’s a view of the social_software channel from the [[Topic Exchange]]. It’s slightly munged because the aggregator is aggregating both topicexchange.com/rss and topicexchange.com/t/social_software/rss, but it’s hard to fix that sort of thing without specifically knowing about the duplicate items I’m generating (/rss includes all the items from /t/*/rss).