For iPhone users looking to get in on the very latest news - check Push 2.0 in the iTunes Apps Store. I hook up Bob Scott's RSS feed (free) to RSS notifications and every time he publishes I get an immediate notification.
Here's the iTunes Link:
http://itunes.apple.com/us/app/push-4.0/id350973572?mt=8
Bob does not publish a lot so this is like a real time breaking news feed.
Here's Bob's RSS:
http://www.bobscottsinsights.com/index.php?format=feed&type=rss