Perspctv is a web service that shows and compares online coverage of up to five issues across twitter, news and the blogosphere.
Currently the site is automatically tracking coverage of the US Election going on right now, but users can make their own dashboards by clicking on the link at the top of the page.
That’s the first one I made, comparing "android”, “blackberry” and “iphone”. Coincidentally, that’s the first one that TechCrunch tried.
Check it out at http://www.perspctv.com/