When I used RSS feeds for blogs, I got nothing from Google. I started a handwritten blog, and Google loves it. Some of the long time bloggers here have mentioned using RSS feeds for blogs, but editing the text, which seems like a good way to go if you want unique content.
Also, some of the folks in the blogging section got me using:
http://www.rss2html.com/ which allows you to use RSS in a little different manner.
I use it to place a dynamic like ad on pages of my site, like in the top of the left column here:
Code:
http://www.lusciousdelights.com/linklist/oral.php
For me, building blogs using only Sponsor fed RSS just has not been worth it.