I too like quick launch, so much more than a screen capture app, also its not free. But i like that i can mute the shutter sound, plus it makes blank homescreen themes easier to use.
I like ZonaSnap as it will allow you to upload your screenshots to Photobucket directly from the app. It is easy to use and is integrated into your blackberry menus.
I like zonasnap cuz it automatically uploads to photobucket if you want. I actually usually use quicklaunch though, and just email it to photobucket if I want it to go there.