Wired is concerned about bandwidth as some News Aggreators are hitting their site every hour. I personally use Newz Crawler and you can configure it very easily for how often you want it to scan the sites. I usually scan once in the morning and once in the evening on approx 400 of the feeds I read on a regular basis and then have another 1000 or so that I only review twice a week.

This site gets a significant number of hits a day to the RSS, XML and the Atom pages but the majority of our bandwidth is burned up on main page loads. I don't really buy it. The price of success of one's site comes with the knowledge that you are going to take a hit in the bandwidth department. Thanks to Scoble for the link. [Scoble] [Wired]