Microsoft is said to be planning to ratchet up its rivalry with Apple by introducing its own tablet device at a press event scheduled for next week, according to a report from TheWrap. The event will see a “major Microsoft announcement” and we’ve heard speculation that it could be one of many possible stories unveiled, from the $1 billion plus acquisition of Yammer, to a partnership with RIM and Microsoft’s tablet strategy. TheWrap says that it is the latter, and a Microsoft-built iPad-rival is coming, according to “an individual with knowledge of the company.” Read the full story at The Next Web.