According to Google / Blogger, here are the special addresses they’ve provided for blog users.

Full site feed:

    Atom 1.0: http://blogname.blogspot.com/feeds/posts/default
    RSS 2.0: http://blogname.blogspot.com/feeds/post … lt?alt=rss

Comments-only feed:

    Atom 1.0: http://blogname.blogspot.com/feeds/comments/default
    RSS 2.0: http://blogname.blogspot.com/feeds/comm … lt?alt=rss

Label-specific site feed:

    Atom 1.0: http://blogname.blogspot.com/feeds/comm … /labelname
    RSS 2.0: http://blogname.blogspot.com/feeds/comm … /labelname

Individual post comment feed:

    Atom 1.0: http://blogname.blogspot.com/feeds/post … ts/default
    RSS 2.0: http://blogname.blogspot.com/feeds/post … lt?alt=rss

RSS feeds from Blogger seem to provide clean code. This is a good thing too because I don’t know of any clean RSS widget for Blogger.