Well that's an easy enough fix. I'm keeping my passcode lock though. [Soup Nazi voice]No lockscreen camera for me....Next![/Soup Nazi voice]
There's a cydia app called "Snappy" that will allow you to open up the camera app from any window. You just assign a gesture through activator with it. Works on the lockscreen even with password code enabled and you're able to use the volume buttons to snap photos. Costs $1.99 but it's worth it to me. I'm able to pull out my phone and take pictures within 2 seconds.