We've specifically talked about Linux and Windows. I'm not sure about Macs.
I'm already working with packagers for Debian and Fedora. I plan on continuing that.
Debian is on the LTS release and has been actively applying security fixes.
Ubuntu, based on Debian, has 1.19 in Raring and Quantal.
Fedora has 1.19 in Fedora 18, but 1.21 in the later versions. I only started working with them so they don't have security updates yet. My understanding is that packages go into Fedora before the go into RHEL and CentOS, but I'll verify this with the Fedora manager.
I've worked on installers for Windows so I could do that in a pinch. This would probably be something that we should find another organisation to do, though, and work with them in the same way I've been working with Debian packagers.
I would expect to work with another community, like Fink or MacPorts, to do the same for Macs.