The fastest I could find was Fox Business, with a 10-20 secs delay: http://www.channelchooser.com/tv/watch/new-channels/fox-business-live/4678/
I can get less than 20 seconds delay on BB than from my tv, but then you got to wonder how much delay your cable/dish is to real time too.
Tried the newsstrike and, well, not much there. A good source for news is Trade the news with audio channel. Can be a little pricy, but if you are looking for timely news to take advantage of, you should be able to cover your costs in no time.