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SEO by Yoast is a great SEO plugin. I use that on my personal blog. All In One SEO Pack is also good.
If there are multiple authors on your clients' blogs, consider using Google Author Link plugin to get their Google+ profiles to appear in search results with their content.
I found a demo video on Scribit and around the 20 minute mark they mention that robots cannot see curated pages on your site (guessing they are tagged as nofollow).
http://www.youtube.com/watch?v=e9-rosbyt5k
So you're probably not going to see much, if any benefit other than people seeing your content on another site and (hopefully) linking to your original article instead of the curated one on someone else's site.
SEO by Yoast is a great SEO plugin. I use that on my personal blog. All In One SEO Pack is also good.
If there are multiple authors on your clients' blogs, consider using Google Author Link plugin to get their Google+ profiles to appear in search results with their content.