So I am finally thinking about jailbreaking my 3gs especially now with all the good things I've heard about Spirit. Though I suppose I am waiting a bit to see what 4.0 has as part of the update, but everythiing they showed looks like features I can JB for now. Plus my big reason is to use Miwi or pdanet (had it on my Q before my iphone and loved it). But who knows what else 4.0 will have in it that I might miss out on. But my question is this. When I download an app form Cydia where does it stay? Does it show up in apps on itunes, or what? Im worried that if something goes wrong and I have to restore that I would lose that app I purchased form Cydia. How does that work? Also, once I JB can I still back up and sync to itunes? Thanks for all the great tips and advice form this site.