This document introduces WikiTags, which leverages Microsoft SmartTags technology to bring semantic information from semantic wikis to Microsoft Office applications. WikiTags recognizes keywords and phrases in Office docs and provides relevant semantic data from wikis in a sidebar. It allows users to view, explore, and contribute semantic wiki content without leaving familiar Office tools. The goal is to enhance collaboration and productivity by surfacing relevant wiki information to users in the context of their work, without overloading them with data. It also aims to make consuming and editing semantic wiki content easier for users without requiring them to learn wiki markup syntax.