I'm looking for some article sites that have the following attributes: Pages Gather PR Over Time Contextual Links are allowed Free Listings Articles actually get read
In my opinion, it's usually only worth your time to submit to a few of the "top" directories. other sites will scrape those, and eventually your article will end up more or less everywhere.
some ideas for finding the "top" directories:
top results on google top results via category on alexa (should give a rough estimate) google directory's entries for that category, since they'll be sorted by PR
or you could just skip all the work and pay someone a few bucks to submit your articles all over the place.
I always find it is best to submit your article to directories which get indexed regularly. If you submit your article to a lesser known article directory which gets indexed infrequently by the search engines then your article could potentially be stolen by unethical webmasters. They could then use this article for a one way link to their website!
Why not try one of the fast indexing sites: GoArticles and EZineArticles.
If a search engine indexes duplicate content it may not give it any value for your website!