Here's a list of 55 sites: http://www.dotsauce.com/2007/06/06/55-active-rss-directories-to-help-promote-your-feeds/
Another is: http://www.bestblogs.asia/submit-rss-feeds.php (Very focused covers MSN, iGoogle etc.,) http://www.bestblogs.asia/rss-submission-sites.php (Just a huge list of sites you could submit to)
i c few lists here. you can also search this forum or even google for a list. lists get posted here from time to time and you will get lot more list by simply searching
Hi Sultan, I don't think it's just a case of randomly submitting to RSS sites in the hope of being picked up/given a backlink...I used to do this with Web Directories, but was a waste of time. As my Submit RSS Feeds article suggests you can add to the big ones like Google, Yahoo and MSN (Technorati is a must too).