If you are trying to get content from other websites without proper approval would be against adsense TOS..u might be in trouble suggest play safe
it is not simple copy & paste, it aggregates resource from all rss feeds and mining then redisplay to the users for example, does google provides you any its own resources? If you know whai i mean..
It should be OK in my opinion but you can never be sure. As the others said it's better to ask the Google AdSense team before.
thats what a lot of people think.. but you have to be careful, what if that Feed has copyrighted material, or ads? (think techcrunch.com feed). Then your violating googles T&C where it says in the guidlines that thou shall not run ads with copyrighted material. This is why there are no ads on the page where you can play videos on youtube if you ever noticed (apart from the front page which is sponsored) Pierce