Hello, althist writers! Today I have started a community timeline called "The British Ain't Coming" where there is a world without the British Isles. This results in changes in the outcomes of wars, colonization, and the world altogether. I would like to see how things end up different in this ATL, so if you would like, please sign up to contribute! I would also like some help developing editorial guidelines, a nav-box, etc.
Also, check out Reximus's community timeline Blank Slate. It is a very interesting concept, and I am surprised it has not been proposed before. :)