Internal duplicate content is OK says Google
In an interview by Rand of SEOmoz with Vanessa Fox of Google she mentioned that there really isn't a penalty for having internal duplicate content...

Search Engine Journal recently wrote an article quoting pieces of a debate that's sprung up about digg (and more generically, the social bookmarking sites) being included in google's index.
Here are...

When you search for something technical on the internet, quite often you'll see a search listing with Experts-Exchange, they tend to be pretty good. In the past you could click the search results and...