Yesterday another DIWUG event! This is a monthly community event in The Netherlands. Albert-Jan Schot (Appie) did a presentation on the Office 365 Groups and I presented a session about the Office 365 API for SharePoint Sites service.
You can find my slide deck on SlideShare, http://www.slideshare.net/bramdejager/deep-dive-into-office-365-apis-for-sharepoint-site-services.
All demos together resulted in a single code base which you can download here.