Both the Google and Yahoo news sources add their own redirect URLS to the start of each news item, such as:

http://news.google.com/news/url?sa=T&ct=us/1-0&fd=R&url=http://www.post-gazette.com/pg/06239/716347-237.stm&cid=0&ei=AkPyRIC9HIWkpQLZjLm2BQ

I suggest if you use an item from Yahoo or Google that you remove the redirect link so that the link goes directly to the resource.

This way, Google/Yahoo don't know that you are using their links.

Yahoo really messes with the URLs. Not only do they add the redirect URL to the beginning of each link:
http://us.rd.yahoo.com/dailynews/rss/search/las+vegas/SIG=1292kcuf6/

They also mess with the actual syntax of the legit URL.
*http%3A//feeds.feedburner.com/~r/foxsports/rss/golf/~3/16892386/5909700

Notice the:
*http%3A//

Should be:
http://

While correcting these links takes a few seconds each time, I feel it is worth the effort, as it isn't any of Google/Yahoo's business. We are just using their resources for research, not using their content.