Great to catch up with so many people at Ignite. For those who couldn't make it, or were busy networking ;-), Microsoft have posted all the session recordings on YouTube. There is so much great content there.
I have created a quick Skype for Business session playlist for those particularly interested in SfB. There is also a way to pull all those videos from YouTube for offline viewing.
Don't forget there is a thread on this tech community forum for each session. You can still ask questions and discuss the sessions here.