qemu-kvm does virtualize, but only on Linux.

We ship on average one major release per month, and one minir release per week. Each major release comes with a detailed blog post explaining significant improvements and what we're planning next.

For example here's the 0.7 announcement: http://blog.docker.io/2013/11/docker-0-7-docker-now-runs-on-...

0.6 announcement: http://blog.docker.io/2013/08/websockets-dockerfile-upgrade-...

It's true that the dates projected in that blog post have slipped - mostly because the amount of usage, contributions and integrations we had to deal with is 10x what we expected - docker is a VERY active project! And we're still adjusting to that.

Another thing that happened since that blog post is our partnership with Red Hat (and several other major partnerships we're not yet allowed to disclose) which gave us the opportunity to make docker available on many more machines. For example 0.7 was shipped in collaboration with Res Hat for support of unmodified linux kernels: that collaboration meant more external patches to review and digest, and a delayed release, but now docker runs on all linux distros! So I think it was worth it :)

I will be updating that roadmap document soon, and perhaps we can write another blog post when that happens.

I'm always happy to answercquestions on irc (#docker on freenode) or on the mailing list!