I ran throught his this week- Gitorious' install is a bit of a pain, and the software is just BROKEN in places (referencing an array, when the variable is not in one).
I like the system, and it's very flexible, but it doesn't seem like they treat it very well for outside use.
I don't know, the only problem I found so far is the lack of tag display.
It is a bit harder to install than gitosis, but you also get much more (for example, people can create projects and repos without your help, all the visual stuff, etc..)
I'm working on a VM/ec2 image for Gitorious to ease the installation pain. I'm working from the the Ubuntu installation script that the Gitorious project provides, and I will try to get the improvements merged upstream. Things are mostly working, so I will be making the work public after a few more days of testing. Feel free to contact me if you'd like more info.