Google is even moving into the territory of scraping content to display. Relevant wikipedia snippets are now being displayed on the search page as a side bar. While Wiki probably doesn't care...there are plenty of other sites that would not like Google to scrape the content and display it on the search page.
Yeah, Wikipedia is creative commons so that should be okay?
You are right though I wonder if they have the rights to sports results and weather that they are pulling.
They have even convinced us all to go mark up our page to help them pull stuff like ratings and reviews out.
Wikipedia explicitly allows that kind of thing with CC-BY-SA licenses, and indeed gets substantial funding from companies like answers.com that do it. (Incidentally, answers.com was the only way to see TeX equations on Wikipedia on my Android phone last time I checked, so it's not like they're adding no value.)
