Again feeling my age a bit. I'm not so sure about Twitter. It's a very different way to think about things, such as texting, and I need to find it's use for me. It will come to me, some day, but not yet.
As for RSS... Well, I love them! Escpecially when combined Yahoo! Pipes. Pipes are a bit intimidating at first. But once you get the hang of them, wow are they powerfully. It makes weeding out the chaff a breeze. I've made pipes to filter job searches or to get specific, detailed news feeds. They are great and well worth the intial effort.