I just found a wonderful  time saver!  A detailed list of 157 places where you can submit your blog/RSS feed.
Here are a few other places which aren’t on the list:
RSS Submissions - http://www.rss-specifications.com/rss-submission.htm
Podcast Submissions - http://www.podcasting-tools.com/submit-podcasts.htm
Blog Submissions - http://www.blog-connection.com/submit-blogs.htm

blogging directories rss Popularity: 4% [?]

Popularity: 4% [?]