Definitely voting this up. Reading all the comments, it looks like there are two complimentary feature sets being discussed here. The first being the general workflow on reviewing articles and the second being assign specific articles/tasks within the workflow to specific people.

For the first, it seems making the ability to mark articles for review a hierarchical permission would achieve much of what's mentioned in the comments. As a long time client I suspect other people are (or will be) in the position of needing to perform regular updates on existing KB articles. I suspect using the article Versions in conjunction with article workflow would achieve the same process for revisions rather than just the limited current status of only new articles.

I would say this feature set would like be a dependent development prior to being able to assign the tasks/articles to specific users/roles.

Also, I would say it's probably worthwhile to fold this request in:

We would like to see that we can assign a collaborator to a certain category, so when an article in that category is submitted for review, that collaborator gets an e-mail to review and publish the article.

I feel like the roles should follow the Article Planner.

For example, the Draft Writer role should be just that - a user with the ability to draft changes to existing or create drafts of new articles. Anything they create goes into the Draft Articles column and that's the extent of their role, without the ability to rearrange, delete, or change access levels to categories or articles. This is incredibly helpful especially when integrating with something like Zendesk or Freshdesk where Support agents (and not writers) may be submitting content that needs to be edited and/or verified before actually being published.,

From there, a different role (perhaps Reviewer) should have the ability to move articles from Draft Articles to Articles in Review. Giving this role the ability to leave in-line comments (a great feature that currently exists but is kind of unusable due to the issue with the Draft Writer role), improving the review process without giving more people a certain level of control over the KB than is comfortable. This could definitely be resolved with a custom user role.

Then, the Collaborator role (and higher) should have full control over the content; ability to create, edit, review, publish, and change access levels, thus moving articles from Articles in Review to Published Articles.

In relation to this, i'd also like to have the ability to specify who needs to author an article. Either a group or a specific person.

Yes, I am the main admin and author most of the content, but I rely on others as SMEs and would like to be able to flag an article for their review, either for new articles or for updates.

Hoping the "approval process flow" is something that is being highly considered by Helpjuice. When deciding on the best software for our company, this was the only missing element.

For us having this extra process flow would be worth paying a little more for. It would help eliminate the need for side emails and follow ups. Having the ability to chose reviewers and approvers with automation would be a game changer.