These are some central pages related to MakeHuman:
The main page for downloads is located at http://www.makehumancommunity.org/content/downloads.html
For ubuntu users there are PPAs at https://launchpad.net/~makehuman-official
The MakeHuman source code repository is at https://bitbucket.org/MakeHuman/makehuman
The bugtracker for makehuman is at http://bugtracker.makehumancommunity.org
You can find more assets, such as clothes and skins etc in the user contributed assets repository.
Getting help, posting suggestions, general discussion
Discussions, user feedback and questions should generally be put in the forum: http://www.makehumancommunity.org/forum
Overview of additional plugins: https://github.com/makehumancommunity
News / updates
On the front page of the community site, you can find news and blog posts.
There is a facebook page at https://www.facebook.com/makehuman. Important news will be cross-posted here. Please do not use this for asking questions. If you have questions, ask them on the forums.