arQiv.org: revolutionize scientific discussion
by connecting readers and authors
To discuss any arXiv article, just change "X" to "Q" to visit arQiv.
E.g: Perelman, Grisha (November 11, 2002). "The entropy formula for the Ricci flow and its geometric applications"
   Article    http://arxiv.org/abs/math/0211159
   Discussion http://arqiv.org/abs/math/0211159
All the interested participants, including the article authors, will be notified of your comments if they choose to opt-in to receive discussions.

You can start from the search box on the top menu bar.
E.g. search Grisha Perelman, or search Ricci flow

Enjoy!