There are twitter feeds for useful things though (including many sites that offer RSS feeds). In fact I've even got a few photography related twitter feeds. BBC do a number of their news feeds on Twitter now too.
I find it easier than messing about with copying RSS URLs and I've yet to find a decent enough RSS feed reader that I can use anywhere on PCs, mobiles, etc, without having to re-enter all my feeds. Google Reader is the most useful to me, though not great on mobiles without a decent native app (at least not on my Nokia).
I use both though.
I'm not totally sold on Twitter, but I see a lot of value in it. It all depends on the content though. Ignoring the "what I had for breakfast" and "I'm on the toilet" stuff of course