What do you mean by "current version of VCAP"? CloudFoundry.com is currently running v1 components, while v2 components are available on GitHub for you to deploy to your own CF environment.
CF v1 components do not provide support for OSGi frameworks, and will not be extended or enhanced to do so. The steps provided in the blog post you linked to would be the way to do this with v1 components if you wanted to deploy your own CF environment, but I would not go this route.
CF v2 components include support for buildpacks, which allow you to provide whatever runtimes and frameworks you would like. Glyn Normington (a member of the Virgo project team) has been experimenting with a Virgo buildpack, which he discusses in another thread (
https://groups.google.com/a/cloudfoundry.org/d/msg/vcap-dev/eWw62odAJMM/rxX6e9DcHGYJ) and provides on GitHub (
https://github.com/glyn/virgo-buildpack). If you want to deploy your own CF environment, you should deploy v2 components and go this route. If you want to deploy and OSGi app to CloudFoundry.com, you will have to wait until the v2 components are deployed there.
Scott