[ame=http://www.youtube.com/watch?v=r2y1aiDVUeM]YouTube - ‪Slide To Certain Apps With Multislide Cydia Tweak For iPhone And iPod Touch - iOS Vlog 443‬‏[/ame]
Multislide is a tweak that will enable you to set different apps to open up after your "Slide To Unlock". You can slide the Lockscreen slider back and forth a certain amount of times so that the app your want to use will be ready as soon as you let go. An example of this is sliding once to open the Messages app after the Lockscreen goes away. This is perfect for pulling out your device from your pocket, changing a song while driving(hopefully you're at a red light), and many other uses. Multislide is free in Cydia and can be found under the BigBoss Repo.