Thought Yahoo’s acquisition spree would culminate with a $1.1 billion deal for Tumblr? Nope, not so much. In fact, the buy-happy company just quietly made its second acquisition in 24 hours — in two different markets, no less. Yes, Yahoo followed this morning’s purchase of iOS photo app maker, GhostBird Software, by making a play into the enterprise conference calling space. Wait, what? Yep, users of six-year-old free conference calling service, Rondee, were tonight informed via email that the startup has been acquired by Yahoo for an undisclosed sum. It will also suffer the same fate met by other recent Yahoo acquisitions — like MileWise, Astrid, GoPollGo and Loki Studios to name just four — in that it will soon be going the way of the dinosaur. After June 30th, the company’s website now reads, users will no longer be allowed to access their data or create new conference calls.