Hi there, This is an excellent but have been having quite a few problems
I can't find the sitemap_index.xml file. I keep getting a 404 error. I'm runnign WP Super Cache and though I found a solution by placing sitemap(_index)?\.xml in the Rejected User Agents (Strings in the HTTP ’User Agent’ header that prevent WP-Cache from caching bot, spiders, and crawlers’ requests).
However I believe this increased my CPU shared usage which eventually got my site suspended. Is there a way to get the sitemap working with super-cache?