OpenTH
OpenTH is an Open Source project to reimplement Theme Hospital but with new features. The relevant pages:
OpenTH.org - The home page, which also includes:
OpenTH.WordPress.com - The Development Blog
The OpenTH Forums
SourceForge.net/projects/OpenTH - The SourceForge development page
OpenTH.pbworks.com - The Wiki which includes information for people who help out on the project.
I sometimes do small updates on Twitter, but I absolutely hate Twitter, so it isn't being updated much.
Make sure you sign up to the mailing list
It seems rather spread out over different sites and services, I know, but they are all linked together to some extent. They will be more in the future.
If you wish to follow the project, sign up to the blogs RSS feed and sign up the mailing list!