I'm testing the new RSS Validator from Mark Pilgrim, Sam Ruby and Bill Kearney.
The following feeds validate: Scripting News, Dave's Handsome Radio Blog. One of my feeds did not validate, I don't want to say which one, but when I went to read the spec, the validator was right! Yay.
The announcement is on Mark Pilgrim's weblog.
This post by Dave and a previous post on the RSS Explorer Tool continue to make Radio Userland a very dynamic environment for weblog content using RSS. RSS is quickly becoming the next evolutionary step for the web.