Thanks, Torley! I've been looking for a way to get an RSS feed of all blog posts again (like the old feedburner one), but I couldn't find one... So with the discovery of the RSS Feed for this Search link, I managed to hack up a link to an RSS feed of all blog posts. (Well, I think... I had to check the "Topics with no replies" checkbox, which I hope doesn't do anything weird for blogs.)
[edit] Actually, I found someone in Answers that had a better link - http://community.secondlife.com/secondlife/rss/Category?category.id=Blogs ^^;
http://community.secondlife.com/secondlife/rss/search?location=Category%3ABlogs&openresponse=true
Long Version: http://community.secondlife.com/secondlife/rss/search?sort_by=-topicPostDate&location=Category%3ABlogs&advanced=true&search_type=thread&search_page_size=10&openresponse=true&filter=openResponse%2Clocation