Where I'm working now, we've implemented the User Centered Design processes starting a couple of years ago. We're currently a two person team as I have replaced another whom had left just last year. In terms of where we are in UCD maturity, we're on the brink of consistently hitting Stages 4 and 5 especially with some new initiatives. The reality is, we're not at the point of having enough people in our usability team to really expand our activities, yet we also want to make enough of a difference to empower our working colleagues. So how do we do this?
A great way to impart knowledge of what we know and ways to implement the user experience design into current processes is to develop an Intranet. This way, anyone who is in need of our help has access to us, not only in our database of UE knowledge, but also through constant feedback mechanisms.
This is a great way to serve those around you who have little or no exposure to what the UCD/UED discipline really entails. The transition is always constant and always progressive, little by little - not one big gigantic step. People cannot handle that much change all at once.
The key is also to have a plan, a strategy with a timeline of where you want the corporation to be (at what stage) and when.