BSDTalk 239 is 55 minutes of talk with Baptiste Daroussin at vBSDCon 2013 about ‘pkgng’ on FreeBSD.  The BSDTalk post doesn’t mention it, but it is the same pkg tool that DragonFly uses, so Baptiste’s plans are relevant to DragonFly too.  (I haven’t had a chance to listen to the podcast yet so I don’t know how much he talks about DragonFly, specifically.)