From TechCrunch we learn RSS is Now Integrated into Yahoo Mail and Alerts. This is a great addition to the service and something I'll definitely be trying out in my Yahoo! Mail account once it is available. I wonder if they'll provide an API to allow desktop RSS readers to synchronize their state like Bloglines and Newsgator Online do?

The following is an excerpt from Michael Arrington's post on the announcement

Yahoo gathered a small group of bloggers, press and others at Sauce in San Francisco tonight to announce the launch of two new RSS products. They have integrated an RSS reader directly into Yahoo Mail Beta, and are expanding Alerts to include RSS feeds.

These are significant new products, aimed squarely at new and mainstream RSS users. The service is not live as of the time I am posting this. I’ve added a screen shot picture from the live demo.

Mail

Yahoo has deeply integrated RSS into the Yahoo Mail beta experience. Directly below the email folders are “RSS folders”. Clicking on the top folder show all posts in a “river of news” format, meaning all posts for all subscribed feeds are listed in the order they have appeared in feeds.

Each feed also has its own folder, allowing the user to read feeds individually (more like bloglines).

A post from any feed is treated exactly like an email - any post can be forwarded as an email or dragged into a folder and saved. All of the great AJAX functionality already working in Yahoo’s Mail beta works with the new RSS functionality as well.

Adding feeds is straightforward - include the feed URL or choose from a number of popular feeds.