InsideMessenger is a free Instant Messaging Agent that you can customise to access your favourite web content.
For example, on feature allows you to add any RSS feed to the agent. The RSS feed is added via the InsideMessenger website, and the agent will dynamically update the menu to reflect the new RSS items.
Other features of the agent include the ability to search through the RSS feeds using keywords, view Google calendar events, search the web using Windows Live Search, and for those using Windows Live Messenger, ability to play games and watch YouTube videos in the Interactive Window.
Another new feature just added is a mashup of Virtual Earth, hotel content and Instant Messaging.