Today at 10 Pacific / 1 Eastern, Apple will hold an event on its campus in Cupertino, California. This is a much smaller venue than the one used last month for the iPhone 6 / iPhone 6 Plus / Apple Watch announcement, so obviously Apple sees this as a less significant event. Apple hasn't said what it will announce, but for the reasons I noted last week, we will surely see a new iPad and iPad mini today, and I also expect to see a number of Mac announcements.
Apple is providing a live video stream of the event on its website if you want to watch the announcements as they occur. Otherwise, a few sites are providing live blogs of the event such as Jason Snell of Six Colors via Twitter, The Verge, and the folks at Macworld.