Seriously, nobody will shoot you if you put the same article on 4 different websites, but I'm quite confident it would be considered duplicate (or quadruplicate?) content with the consequences you should already know.
Aren't having RSS content feeds displaying on your site a good thing for your site, as it's adding fresh content contantly and Google likes this, just like the many dupes of YouTube embedded vids and various news feeds which are identical on countless sites.
If Google penalizes for duplicate content. Do they have a different rule for RSS feeds and vids vs. plain undynamic text?
Yes in that G does indeed like fresh content.
No, in that it's not YOUR fresh content you're putting up.
Now, the way to make the twain meet is wrangling the content decently (some people he will send you to an awesome site, but there's a monthly service charge. Worthwhile if you want even one new article every day).
Or to include the content, and make your own commentary on it... which isbasically how the blogosphere works.
I'm sure it's fine to have the same content on all 4 sites, but I myself would never do it. EZA and Squidoo are pretty powerful, so I always submit original (or at least decently rewritten) content to be used exclusively there.
Hubpages, BB, and a bunch of other content sites get mass submitted articles from me
Are you saying, add the RSS content feed with user comments allowed underneath it. And this will get through the Google duplicate content rule (because the user comments make it appear original enough) ?
I had very good luck with Squidoo + Hubpages. Adding SEO and eZine to the mix sounds great. Hubpage is a stickler for unique content, and probably eZine is too. I suggest perhaps submitting original content to eZine and spinning the content for Squid and Hub.
Amen baby! Duplicate content only applies to content found on your own website. If you have duplicate content on your website, you are pretty much screwed when it comes to getting search engine rankings.
You can spam the hell out of the internet with your content, it won't hurt you at all. However, a lot of it might not get indexed or may take months to get indexed because it is dup content. You just need to determine what the tradeoff is for you and your situation.
Just this afternoon I was listening to an SEO manifesto in which it was suggested the highest priority is to vary an article's author credit link anchor text and if possible the target page.