I too am submitting my rss feed to places tonight. I am submitting a feed of my
latest reviews on Porn Site Insider. I found a great list here -
http://www.rss-specifications.com/rss-submission.htm
There are a few dead links, but if you go to the index page of the sites, you can see where some of their new submit forms are. Some of the links in the list there bring you to rss feed submission sites that submit your feed to multiple sites. Check it out.