Yes. It is like massively decentralized news aggregation.

You can just follow any-old tag and see what comes up, or you can try and improve the signal-to-noise ratio by following the people you generally enjoy reading and create specific lists.

I've also found it helpful in big conferences. at the WCC2010 I switched streams (there was 16) a few times because the quotes coming out of other sessions hinted that the other one was more interesting/relevant to me.