There are lots of great points made in http://bhorowitz.com/2010/05/14/why-startups-should-train-their-people/ but I mostly enjoy the notion of managers training staff as a way of clarifying performance expectations. Too often there’s limited guidance so staff are left to try their best. But perhaps helping staff to understand what you think success looks like is an easy way to motivate and be transparent at the same time.
I also think many of the compelling arguments raised about the value of training can also be applied to social media, particularly blogging. Sharing a little of your time now can bring back exponential future value to others.