Last week we accepted Chef Provisioning as a new component in the Chef maintenance policy. This means that community members can become maintainers of this project, contribute improvements to it, merge PRs, release changes and help guide the future roadmap.
If you are interested in becoming a Chef Provisioning maintainer, please read about the process here. All the supported drivers fall under this same maintenance policy. If you want to be a maintainer for a specific driver you will follow the same process as someone who wants to be an overall maintainer, but you would not be required to maintain drivers you are not interested in.
If you have any questions feel free to reach out to me on the Gitter where the community is most active.