I’ve turned the last patch in this ticket into a plugin and submitted it to .org. When it gets approved, it will be available to download here. If you want to take a look at it early, let me know and I can give you a direct link to the zip. It’s not anything special, it just moves the Help tab up into the admin bar, but I wanted to get it done before our meetup next week.
Update
Plugin is live. Download here: https://wordpress.org/plugins/contextual-help/