any plans to release written VOD for v5.1 that will cover the evolution topics
I passed my written fairly recently using the official v5 books along with the links Cisco provides for addition reading/study which includes the new topics added in 5.1 under additional resources that covers Evolving technologies. I also watched all of the v4 videos that INE has and lab'ed the examples given throughout the videos. It was a hard test but is achievable once you commit yourself to the process. Good luck and don't give up!