I am sure that this is well-known for an elite few SEO-type folks, but it is new to me, and thus I am posting it for posterity.
Strayed across some choice tidbits today. Was doing the work to make a custom ASP.NET MVC site have an automated Sitemap stream and suddenly realized that various blogs that I maintain did not have this service either.
Ever wary of re-Inventing wheel-like structures, I did some digging and came across this (slightly outdated) reference on how to use the ATOM feed of a blogger site as a sitemap. More important, however, was the user comments that suggested using the following URL for a live sitemap feed:
atom.xml?redirect=false&start-index=1&max-results=100
Since Google Webmaster Tools no longer allows a full sitemap URL, copying and pasting that value into the sitemap add UI will yield delicious, automated discovery of Blogger.com content.