Gawker Media founder Nick Denton just told his employees that the company will move into a massive new office space next year. "Earlier today, we signed a lease for three floors of 114 Fifth Avenue," he says in a memo to staff. "It's a long-term commitment funded from our growth over the last three years -- and a mark of our confidence in the prospects for online media, and our own trajectory." This is just the latest sign that the online media space is booming now.