You can lead some people to Pyra, but you can’t make them blog. Google Search solves half the problem, but you still have to create the content. It turns out that Google may have an answer here as well - because we are dealing with employees, not the general population. And we can easily reward employees who author content with a high page rank. Remember that the discovery of hidden gems can be just as valuable as the creation of new ones, so reward those who link as well.