I'm interested in many companies and what they are doing. But after spam, those newsletters are just cluttering up my email box. Most of the time I read the first three words, and delete.
But I'm afraid of missing something. But with RSS and some nice online services like bloglines, I can track everyone in one place. Anything new happens, I get it. But only when I want to.
So rather than complain about people's slow to move to RSS, we're designing our new company's technical bulletins, whitepapers, case studies and those cool marketing announcements on RSS feeds. And of course blogs.