Personally when I write a good post to my blog I make sure to submit the post in article form to the major article sites and have seen no adverse consequences within the serps or
PR. Anyway here is what Google webmaster blog (official) says about DC:
http://googlewebmastercentral.blogsp...-scrapers.html
The part that fits well with your question:
"In the second scenario, you might have the case of someone scraping your content to put it on a different site, often to try to monetize it. It's also common for many web proxies to index parts of sites which have been accessed through the proxy. When encountering such duplicate content on different sites, we look at various signals to determine which site is the original one, which usually works very well. This also means that you shouldn't be very concerned about seeing negative effects on your site's presence on Google if you notice someone scraping your content.
In cases when you are syndicating your content but also want to make sure your site is identified as the original source, it's useful to ask your syndication partners to include a link back to your original content. You can find some additional tips on dealing with syndicated content in a recent post by Vanessa Fox, Ranking as the original source for content you syndicate."
Anyway I hope this answered your question.