Is it stealing?

Mark Glaser at PBS's MediaShift did an interesting story on when blogs, and other online sources steal and when they're just promoting other people's content. I'd have to say I agree with every example he gave, save perhaps the Reuters example. Is it wrong for one paper to 'report' what another paper has said, if they give credit? How much do you need to take before it's stealing? Again, I think Glaser's analysis is pretty spot on. But I think I'll pass on excerpting it :-)