ThePort is launching Blerts at Demo 07 today. It's a new RSS application for your desktop. It pops headlines from your RSS feeds onto your desktop, instead of requiring that you go to a RSS page or fire up a standalone app to read your feeds.
The service can be configured to treat feeds differently--you can have some feeds pop up immediate alerts on your desktop, some just display a little icon on the desktop, and others stay quiet no matter what. It's similar to another RSS pop-up app that I like, AlertBear.