IGN posted that Microsoft has registered several web domains entitled Halo Infinity.
http://xbox360.ign.com/articles/122/1222284p1.html
They go on to speculate what it could be but they don’t bother to mention something that should be obvious to those who read the books… The UNSC Infinity! We see this ship prominently displayed as Halo 4 concept art and then it’s mentioned numerous times in Glasslands which is supposed to lead into Halo 4. I don’t think it’s a coincidence that its name is now found on multiple registered Halo websites. I would bet the ship plays an important role in Halo 4’s marketing and we’ll be seeing a lot more of her very soon. Tomorrow perhaps?