Next week, Apple will unveil its much-anticipated iCloud service at its annual developer conference, WWDC. Apple even put out a press release this morning pre-announcing the service—something it almost never does. Details began leaking out in March, and then the name was pretty much confirmed when Apple bought the domain iCloud.com. Yet for all the talk and speculation, we still don't know exactly what iCloud will look like, or what services it will include. Here is what we know so far (or at least what we think we know):