These are some central pages related to MakeHuman:
The main page for downloads is located at http://www.makehuman.org/content/download.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 for 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
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.