The standout talk was of course James Ross with his interesting, educational and laugh-out-loud funny talk "Why nothing you ever do might make the slightest difference: A crash course in the Theory of Constraints"
Also fantastic to see was Nicholas Thorpe and Fiona Siseman's "Agile Board Hacks" a tour de force of real word agile boards based on their excellent blog here: http://agileboardhacks.com/
Another talk I really enjoyed was Design Eye for the Dev Guy by Julian Boot with a bunch of tips around basic design principles such as proximity, enclosure, continuity and connection.
Finally I'm hanging out to see a health dashboard tool based on James Brett and Marina Chiovetti's wonderful talk "Continuous Risk Management".
I hope the slides for the above talks will be available, I'll link to them here when I find them.