The core of the post is here: "Pulling RSS feeds every 30 minutes is not going to cut it, ever. We need something that pushes, and XMPP is the way to do it." Well, is this true? It depends. If you want something real-time, like instant messaging, then you need something (selective) that pushes. Like, well, instant messaging. Like Twitter, for that matter. But if it's not time-sensitive, then you don't want to be bothered or interrupted by it. This is when pull works. Like, well, RSS. Or your newspaper.
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