- Would I have to manually upload each individual Sitemap or could I just specify the Sitemap index?
- If I just specified the sitemap index, would it let me "drill into" each individual sitemap?
The answer, as you would expect from Google, is that you can just specify the sitemap index -> from there Google will 'find' the individual sitemap files. Each individual sitemap can be examined in the webmaster tools - and all the statistics "roll up" under the main Sitemap index. Nice work Google!
Also, for those of you who are curious - it took a few hours for Google to parse and update statistics (# of urls, # of pages in web index etc.) for the 10MM or so entries.