Microsoft began rolling out Office Delve last September, but the contextual search and notification tool for Office users remains a work in progress. The newest additions to the platform are iOS and Android clients, along with enhanced people-based search tools.
Annoyingly, neither the iOS or Android apps have been released to the Australian app stores for those platforms just yet. Microsoft says the release will show up outside the US, Norway and Ireland (a random selection if ever we saw one) in "the coming weeks".
As well as people-centric search tools, Delve has also added a blogging tool. Hit the announcement post for more details on the new features.
New Office Delve People Experiences in Office 365 [Office 365 Blog]