I find Air Mouse Pro really useful! I've got Jaadu VNC as well, but for simple tasks like loading up a movie or something whilst in bed it's absolutely perfect. Nice design and features. You can either control it by tilting the device or like a usual trackpad... x
Give remotepad a try first. It's free. I really liked it but it didnt have a keyboard so I ended up buying iTap which is really good. But I noticed that the free remotepad now has a keyboard...
I use Jaadu ALL THE TIME. I love it! You can always turn off the screen display and use it as a standard trackpad to save battery too, but I just use it to start tasks (like recording something on eyetv) or check stuff.