+1 for Daniel's comments above.
There seem to be two camps here - the people who are able to go and search the foundries for interesting and "playful" (etc.) fonts and those who are not.
I'm currently working with a multinational, but the recommended fonts in the Style Guide are Calibri and Arial, which are not exactly going to set the World alight visually...
I can understand why corporates have guidelines for Marketing material, flyers, website etc. however, in many cases they do not mention "eLearning". Perhaps there's an opportunity for IDs to explore whether our creative process comes outside the boundaries of the current guidelines? It's a bit like them saying "Paint us a picture only using red and purple" - certainly I would question that request.