I think anything that can be said in 140 characters or less IS noise. I've been on Twitter for a while now and have created a couple of lists with just a few people on them who's blogs and podcasts I love. They don't Tweet much but when they do it has been of no interest to me.
Answer me this, if RSS is dead, how would you tweet this blog post or even the comment I'm responding to?
Some will say it's because I'm old but I don't think that's it at all. I think Twitter is shallow and I just want to get into the deep end ... maybe even over my head.