Suggestion for Workbooks
I love all the videos and workbooks that I have access to. I am currently studying for the CCIE R&S. The one thing that sticks out in my mind that would be awesome is if in the workbook labs had a link to the video for that technology.
For instance, in the workbook if your working on the lab "DMVPN Phase 3 with EIGRP" that it would have a link to the "CCIE Routing & Switching v5.1 Advanced Technologies DMVPN Phase 3 Configuration" video by Brian. That would save tremendous amounts of time trying to search through everything and finding the best video.