RSS Validation matcher for RSpec/Rails

As I posted to rails-talk yesterday, I whipped up an Rspec matcher
using the feedvalidator gem, which lets you write

   response.should be_valid_feed

in view specs or controller specs which integrate_views

I wrote about it this AM.

http://talklikeaduck.denhaven2.com/articles/2008/02/08/validating-rss-feeds-with-rspec