Originally Posted by jsconyers
There are free themes on this site, check the aftermarket section.
You can set your device to lock after a set amount of time. Go to Options>Security Options> General settings and enable password, then select the timeout.
Additionally, if you use a holster with a magnet, it will put the device in sleep mode and you wouldn't have to worry about it dialing numbers.
I don't want a password on my phone, just a lock so I don't bump keys.