"What are you working on?" asks Yammer - as a work-related version of the Facebook question "What's on your mind".
As a way of getting people to share work-related activity, that's a good question, and pretty soon you will find your Yammer stream full of statements like
- "I'm working on a new proposal"
- "I'm getting ready to go on holiday"
- "Im finishing the assessment report"
If you want to use a product like Yammer for knowledge sharing, then I can't help thinking there's got to be a better question - one that drives Pull and not Push; one that develops the habit of Asking.
Maybe something like
"What knowledge do you need to help deliver your work?"
"What can your social network help you with today?"
"What question do you have for your network?"