iOS 4.0 has arrived just in time for the launch of the iPhone 4 this Thursday. The newest version of the recently renamed OS brings a slew of new features, such as multitasking, folders and a universal inbox.

Of course, Android owners have been enjoying these features for a while now. While Google has been playing catchup for years with iOS, this year has been different. Android 2.2. (FroYo) was revealed with much fanfare last month at Google I/O, complete with a speedy interface, better performance, cloud syncing and, yes, Adobe Flash 10.1.

As we stated at the time, Google essentially declared all-out war against Apple and the iOS, and it's a war that's quickly heated up. While Google touts 100,000+ Android activations per day, Apple can simply point to unprecedented iPhone 4 demand. There's huge demand and interest on both sides.

Now that both OSes are out, we want to know: Which one has your loyalty? Do you love the iOS and its vast app library or do you prefer the choice and open nature of Android? Let us know in the poll below, and don't forget to leave a comment explaining your choice.