I read lots of blogs and planets every day, and do so from multiple computers, so I value the online feed aggregator. It retrieves new items even while I'm offline, and I don't have to synchronize between multiple machines. Google Reader has filled this niche for a while now, but I've kept an eye out for open source equivalents that I could serve from my own domain instead. That is just what GobbleRSS is: a PHP-based feed aggregator that is simple to set up and run on your own.