Numerous webmasters are reporting that Google News (and Google Book Search results, as we reported) are showing up in the SERPs for particular Google searches. However, these news stories aren't recent; they are relatively old and dated.
Unfortunately, I'm not able to reproduce the search (perhaps I'm searching for terms that always have associated news), but there's a question about Google's relevancy if it's providing old news stories.
Further, to that end, there are also observations of MSN and Yahoo shopping results. Interesting.
Forum discussion continues at WebmasterWorld.