nodalpoint.org

Biomedcentral is arguably one of the more progressive online publishers, they have allowed reader comments on each published article for some time now. Recently I tried to track down a comment I made a while back and couldn't actually find a central comments page, so I emailed the support people and asked if they had or planed to implement an RSS feed for comments. At the time no, but now they have a comments page (amazingly Matt Cockerill, who is in charge of Biomedcentral, responded to the support request). Based on Biomedcentral's RSS page you should be able to access the RSS feed of the page by adding rss to the end of the link. This doesn't work at the moment, but I'm sure it will.