I asked around about your question and had the following reply:
The RSS feed would be a good option for them. The RSS can be the single point of data so they only have to make updates on one page. I’ve typically seen customers use one RSS feed that contains a combination of both upstream/downstream content such as major dates, updates, training, etc. I have not seen it is used as a daily update for an individual product on an integrated site.
Thank you for your input, Jen, that's an interesting idea. We don't typically have a lot of updates, and I could see how using the RSS feed might be a good approach for sharing info across the tool, possibly along with the news portlet sharing static data. I'll look into what's involved with creating this, and how it functions.
I am personally not of the mind that the division of news portlets is a bad thing, though. I'm hoping to have input because I see a definite utility in keeping the two streams separate, but I'm hoping to have opinions from users dealing with the practical effects of this split. Have you heard any feedback from suite-integrated clients who have been working with both portlets, Jen?