Thats a cool idea – having RSS feeds in my Yahoo mail account. Why? Because I always check my mail everyday & I don’t need to open up a separate tab, sign in to a separate RSS aggregator/reader. This deeper integration of RSS into mail is a welcome one as 1) it increases the RSS awareness & 2) it helps me, the user.
Think aggregators offer much more functionality but lets see how Yahoo performs. Haven’t got a chance yet to try it as Yahoo Mail Beta isn’t avl to everyone 🙁 )Update: I now have RSS feeds feature & I love it!)