Agree, we use Yammer at work and it's fairly useful to have somewhere to share thoughts or problems with others, especially for something that isn't worth interrupting others for, but if you post it up then someone may have a useful comment on.

It isn't really a 'social network' - the resemblence to Facebook is only skin-deep - but it does form a useful channel of communication.

Then again, I like my colleagues and trust my boss - perhaps the cases where people don't want to engage are revealing a more fundamental problem of lack of trust within the workplace.

I use Git to good effect in a fairly traditional corporate environment. We're much better off since switching over from SVN.

Never mind the 'distributed' part - the big challenge for source control in a traditional setup is when two people have both modified different parts of the same files, and the second guy goes to check in. Git is much better at handling conflicts than SVN is - conflicts that would cause real pain in SVN often merge smoothly in Git.

It's also much better at handling branches, e.g. a release branch. Remember 'tree conflicts' in SVN? Not an issue in Git.

Git is a better SVN, as well as being a distributed source control system.

My company has its website hosted from a nuclear bunker. Very secure, reliable, etc etc. Actually getting the guys there to DO anything for us, (like upgrade MySQL), is an exercise in frustration, to the point that it is a real limitation on our ability to develop our product.

So, when looking for hosting or backup, don't allow 'OMG Mega Nuke-proof Security' to distract you from also evaluating all the other relevant criteria (such as responsiveness and know-how).