RSS Feed Aggregator

I stopped using an XML feed aggregator for a little while, but now find I can’t live without it. I use SharpReader, but there are other good choices.

What is an RSS feed?

Some feeds I like:

/Nerd: Tod Maffin's CBC Radio Tech Column
description="Stay on top of the latest in consumer electronics, the Internet, and technology with Tod Maffin's weekly tech column, as heard across Canada on CBC Radio One."
xmlUrl="http://feeds.feedburner.com/cbcnerd"
htmlUrl="http://www.cbc.ca/nerd/"

BBC News | News Front Page | World Edition
description="Updated every minute of every day"
xmlUrl="http://newsrss.bbc.co.uk/rss/newsonline_world_edition/front_page/rss.xml" htmlUrl="http://news.bbc.co.uk/go/rss/-/2/hi/default.stm"

AP Top Headlines
xmlUrl="http://hosted.ap.org/lineups/TOPHEADS.rss?SITE=ALMON&SECTION=HOME"
htmlUrl="http://hosted.ap.org/"
   
Quirks and Quarks from CBC Radio
description="CBC Radio's Science Radio Program. Join host Bob McDonald each week to find out the latest in science, technology, medicine and the environment."
xmlUrl="http://www.cbc.ca/quirks/quirks.xml"
htmlUrl="http://www.cbc.ca/quirks"

Google Blog - Live
xmlUrl="http://www.google.com/googleblog/atom.xml"
htmlUrl="http://www.google.com/googleblog/"

ongoing
description="Ongoing fragmented essay by Tim Bray."
xmlUrl="http://www.tbray.org/ongoing/ongoing.rss"
htmlUrl="http://www.tbray.org/ongoing/"

Any other suggestions?