While Apple's keen to make sure nobody ever uses the iPhone's slide-to-unlock system, Google seemingly couldn't care less. It's filed a patent listing a whole heap of news ways to unlock your phone — including voice commands.
Patently Apple report that Google has filed a patent that describes new ways to unlock mobile devices, which would allow users to simultaneously execute commands, like calling a specific contact or launching an application. In fact, some Android devices already allow something similar — my HTC Sensation allows me to open one of four applications as I unlock my handset — but this patent also explains how different commands could be used to the same effect.
Most interestingly, the patent discusses using voice commands to unlock handsets. [Patently Apple]