I think we start to have a good list of people wanting to contribute here, it’s awesome! We should divide the needed work in some groups. Remember for that is only for theming, not for changing any behavior or extensions shipped, meaning:
- we will still have Ubuntu Dock and indicator extension
- we don’t want to deviate from GNOME: changing behaviors or paradigms, making it looking like Unity when it’s not, and such.
To reemphasize, we want GNOME Shell and applications looking like ubuntu 
So, rereading the thread, I have collected names of people stepping up, and it looks like we already have very talented and enthusiastic group of people here: United Gnome GTK theme, Pop/Popiance, “Finding Ubuntu” concept, individual designers and developers 
Also, we contacted Sam for the Suru icon theme who is up to the challenge, I’ll try getting him posting here
I think from that point the most effective is to create subgroups and start lining up something like a plan.
Current team
My suggestions, from the names I saw above (please shout if I forgot anyone):
Designers:
The designers will create new mockups for the Shell, GDM, and popular applications to represents main interactions and what they look like on the GTK theme. Of course, I think theme developers will help them in that regard and telling what’s possible and what is not, while we keep all in mind this should respect the ubuntu feeling and color palette.
Theme developers
@godlyranchdressing
@c-lobrano
@Merk42
@isantop
(and I can give a hand myself as needed ;))
This is the group who is primarly going to turn the mockups to reality, and will review external contributions
plumbing: CI/Project preparation
@merlijn-sebrechts
and I can give a hand there too.
- Preparing the branches (Shell, GTK, icons) for easy rebasing on upstream changes
- Wire up CI to upload any new commits in master to a ppa so that people can check progress
- Maintaining the system and keeping it working
icon theme
Sam answered by email and I’ll trick him to post here He’s happy starting from his Suru work
@rodrigostucker
Of course, as I was expecting, this post has a lot of great suggestions and ideas I suggest (no punt intended :p), that we keep them going on this topic.
Thus, we did create a hub subcategory available for reading to everyone, but restricted to writing for the above group (and new contributors coming along). That way, people who are just interested in seeing how the project progress can see in a concise way the advancement, and people working on the project can take into from this topic, and discuss more quietly on the other one.
I have created some bootstrapping topics to get our first phase move (getting the branches up) while designers can work on the mockups. You can check them on Theme Refresh - Ubuntu Community Hub. The icon discussion will come as soon as I get a hand on Sam I’m going with @willcooke to London in a week and half, and we will discuss with our design team to get some inputs and having them contribute as well.
Of course, that doesn’t prevent anyone else to contribute as well, we’ll have PR and look at them, as a team.
This is exciting times!