Yep, you can get bioflavinoids from taking Ester-C. I take 3000mg a day, but have heard you can take up to 5000mg. My understanding is the older you get the more you should take.
Here's another article to add to yours that talks about the benefits of bioflavinoids/rutin.
What Is Rutin (http://ezinearticles.com/?What-Is-Rutin&id=82452 - broken link)