So, I was about to make a regular sitemap.xml for my site, then I saw that both Google and Bing accept Atom and RSS as sitemaps.
My site is a forum, so there will be new pages created very frequently.
Will using an RSS/Atom feed cause new pages to be indexed more quickly than if I use a regular sitemap.xml?
What are the SEO benefits of one method vs another?
Sitemaps are better because they tell search engines about all of your content, not just the X number of newer threads that RSS and Atom feeds are limited to. Plus they offer extra information such as importance and other items that RSS and Atom do not offer.