Do you know about twitter search?
Warning: addictive, disheartening, thrilling or banal... often in combination.
Visiting twitter search will allow you to track what the anonymous masses are saying about you, your favorite politicians, your brand, whatever...
You can grab an RSS feed of any search you do, so your rss reader will be always updated with what's going on with the buzz on things you care about.
It's sort of like a 24 hour a day focus group, a never-ending riff on what people are buzzing about. Don't say I didn't warn you.
PS if you use twitter, remember that what you say is not just seen by your few followers. It's seen by anyone who searches.