StreamInsight in SQL Server is a Complex Event Processing Engine which can manage and mine the data in real-time. A practical application has developed to stream Twitter data and analyse this data with Microsoft Azure and Hadoop. Application can be downloaded from here. Power Pivot, Power View and Mobile Devices can be used as Front end tools to analyse this data. To get an understanding on Big Data you can read this post and below is Microsoft picture of Big Data.This post outlines the Microsoft’s view on Big Data and explains the steps in Building the Twitter and Big Data application.