Google usually does not penalize for duplicate issues, only index and
ignore the copy so that there serps (search engine results page) has
only one listing of the content instead of ten so they can provide
better results to choose from for a search.

I have put duplicate content on SSL certificates that I am allowed to
use from my reseller site. Since my web pages are a different style,
but contains the same general information I still rank high in the
search engines 'long tail' wise and receiver a few hundred visitors a
month inquiring information about SSL certificates.

Datafeeds are a different animal. Try doing a search for the duplicate
content and see how close the content between the two matches. Take for
example by typing in 'How to Control Search Engine Robots' into Google
and you will find many results of an article that I wrote. Although the
content is exactly the same the pages that they are found on are styled
differently and because of that you will find many serps (search engine
results pages) containing the same thing.

Michael Rock
http://www.webrankingconsultants.com
http://www.theinternetpresence.com