The official GitLab blog, announcing releases of the open-source GitHub alternative and reporting on security fixes and new features.
HN links it for release announcements and security advisories, with commenters using it to confirm features like image diffs and urging upgrades after vulnerabilities.
> you basically install git-daemon, which allows you to run a central git server
AFAIK, git-daemon is to allow the specific use case of anonymous, public access to git repositories [1].
You don't need it to have a "central git server", though: If you have an ssh account on yourhost.com and a git repo in /home/you/yourproject on that machine, you can simply git clone git+ssh://yourhost.com/home/you/yourproject. Give out multiple ssh keys to that account, and it's a minimal but functional "central git server"!
Of course, doing the above the easiest, quickest way, with a single UNIX user account, results in (A) giving git client users access to a shell and (B) giving git client users read/write access to each others' repos. Gitolite uses authorized_keys restrictions to avoid (A) and a clever SSH_ORIGINAL_COMMAND hack to avoid (B).
> doubt it is gitolite
Gitlab in fact did use Gitolite for actually serving the git client until quite recently. The largest change in 5.0 was reimplementing a subset of Gitolite's functionality and losing the dependency [2]; the project's major version number is still at 5, although 6.0 is promised soon [3].
[1] http://git-scm.com/book/en/Git-on-the-Server-Git-Daemon
[2] http://blog.gitlab.org/gitlab-5-dot-0-has-been-released/
[3] http://blog.gitlab.org/gitlab-5-dot-4-released/
For those who aren't familiar, Gitlab is essentially an open-source clone of Github.
For those who already use it, this is a good time to upgrade, because multiple security vulnerabilities were recently fixed [1]. (You can upgrade to a patch version within the same major/minor release, e.g. 6.2.3 to 6.2.4, but it's not too much more effort to just upgrade to the latest 6.3 release).
[1] http://blog.gitlab.org/multiple-critical-vulnerabilities-in-gitlab/
GitLab has basic support for image diffs since v3.1 http://blog.gitlab.org/images/3_1/3.png
That was just added last month, in 6.2: http://blog.gitlab.org/gitlab-ce-6-dot-2-released/