Whether you're a developer looking to test your apps against BlackBerry OS 10.3 or simply just want to take a look at OS 10.3, you can now download the latest device simulator from the BlackBerry website. Previously it sat at OS but has now been updated to OS Keep in mind, if you plan on giving it a look you will need some VMWare tools in order to run it all but you can find the full details on the BlackBerry Developer site along with the download links for you respective computer operating system. Shame that BlackBerry Blend link doesn't fully work quite yet.

Download the BlackBerry OS device simulator