See http://www.dmarc.org/overview.html DMARC appears to be an evolution of DKIM/SPF reputation tools.
I'm sure it will be soon, dmarc is still in draft status. I not really a DNS person, but I was able to set mine up using an online dmarc wizard. You get a lot of information back from the companies that report it. But it's all in XML, I need to program or find a good parser for it.
Thanks. So for my company to get data back based on DMARC about senders using our domains,, we just publish the spec. If we want to use DMARC to filter inbound (to us) mail, Brightmail needs an update to support.