Thumblogger has its own feed burner thingy I gave up on it personally
Now if you want to set up a wordpress blog and pull in feeds so they post that I can walk you through
Heres a couple examples of rss feed fed blogs
http://shemales.adultblogsite.com/
http://indianporn.adultblogsite.com/
Our feeds are all morphing text and picture feeds so you don't have to worry about duplicate content
We offer free cpanel hosting with one click wordpress install's
both them sites were set up in maybe a hours work each.
If your intrested hit me up all my contact info is in my sig