You can follow all the posts from wordpress.com tagged with “Ubuntu” or “gutsy” with a rss feed reader:
Ubuntu tag: http://wordpress.com/tag/ubuntu/feed/
Gutsy tag: http://wordpress.com/tag/gutsy/feed/
I do not understand a lot of them, as I only read French and English, but I really like this buzzing community feeling, and I discovered several interesting blogs.
If you were not quite sure that Ubuntu is really popular, here is a proof: I reported several spam blogs tagged with “Ubuntu” (you know, the usual medical or real estate stuff) :D
You can also track new posts for a certain tag with Google Blog Search.
Ubuntu: http://blogsearch.google.com/blogsearch_feeds?hl=en&q=ubuntu&ie=utf-8&num=10&output=rss
Gusty: http://blogsearch.google.com/blogsearch_feeds?hl=en&q=gusty&ie=utf-8&num=10&output=rss