Plenty of announcements at //build, but here, we'll cover the announcements for Azure IoT Hubs and Microsoft Office.
Some follow up //build sessions can be found here:
Developer's Guide to Connecting Devices to Azure IoT: Olivier Bloch covers the SDKs and everything you will want to use to connect your device to Azure.
Azure IoT: Complete Cloud Offerings for the IoT Revolution : Cameron Skinner and Doug Seven cover everything Azure has to offer for IoT
Build Office Add-ins with Any Code Editor and Office Online: Harrison Shapely covers how to create an Office Add ins.
Building Office 365 Group Connectors: Simeon Duong gets you up to speed on creating O365 connectors.