First off, if you currently run a news aggregator, check to see if you're running the most up to date version. It has been pointed out in several places that a lot of aggregators have not been doing the right thing bandwidth-wise (namely, using the built-in features of the HTTP spec to reduce bandwidth when requesting content that hasn't changed.) The latest betas of Netnewswire Lite and Userland Radio now implement the appropriate HTTP request mechanisms, and I'm sure other aggregators will be revised to do the same soon.
I think that I shall never see
A thing as lovely as a tree.
But as you see the trees have gone
They went this morning with the dawn.
A logging firm from out of town
Came and chopped the trees all down.
But I will trick those dirty skunks
And write a brand new poem called ‘Trunks’.