Welcome to WebmasterWorld Guest from 126.96.36.199
If you have site map questions please post them in our Sitemaps, Meta Data, and robots.txt forum [webmasterworld.com].
As for RSS and SEO [google.com], this is a topic that comes up from time to time. You'd probably get a better response if you had a more specific question. Otherwise those threads I linked to will probably give you much the same advice I could rehash here.