Let me add my five cents:

We use bitbucket now since two months at PSI, and are very happy with it.

Pros:

- We like the GIT flow model (http://nvie.com/posts/a-successful-git-branching-model/). You can at the same time do hot fixes, have a "distribution 
version", and keep a development branch, where you can try new things without compromising the distribution.
- Nice and fast Web interface, especially the "blame" is lightning fast compared to SVN/CVS
- GIT is non-centralized, so your local clone of a repository contains everything. If bitbucket is down/asks for money, you can continue with your local 
repository and clone it to some other hosting service, or host it yourself
- SourceTree (http://www.sourcetreeapp.com/) is a nice GUI for Mac lovers. 
- Easy user management
- Free for academic use

Con:

- Wiki is limited as KO wrote, so it should not be used as a "full" wiki to replace Plone for example, just to annotate your project
- SVN revision number is gone. This is on purpose since it does not make sense any more if you keep several parallel branches (merging becomes a 
nightmare), so one has to use either the (random) commit-ID or start tagging again.

So I conclusion, I would say that it's time to switch MIDAS to GIT. We'll probably do that in July when I will be at TRIUMF.

/Stefan