I had been planning to mention these posts in one of my morning coffee posts, but now that I have read them in a single sitting I thought they deserved more attention.
As Derek Finkle elaborates in one of the posts, a couple Canadian publishers are rewriting their freelance contracts. They are awarding themselves more rights to republish an article at a later date. In a later post he discusses how writers could be shortchanged when a publishing house tries to acquire the rights to an older article.
The first post in the series is more of a general overview of magazines' growing shift into ebook publishing, and it is well worth a read. I would say that this entire series is worth reading.
If you have any interest in getting paid for writing or an interest in paying someone, this series could best serve you if you looked at it as a set of case studies.