Everyday, I spend like 1 hour reading news in my netbook, and I use Google Reader (yeah, I'm a Google fan) as my feedviewer, but I don't know how much I have to read.
With this extension, you'll have an icon with the number of unreaded news, and... It will show a desktop notification when you have something new to read! :D
It's a very useful extension. You can also mark all the news readed without entering to Google Reader.
Link to Chrome Web Store