Once you Jailbreak everything on your phone will work just as it did before including the app store. The cydia app just contains a lot of apps that for what ever reason apple did not allow into their app store and like I said before tweaks that will actually change certain functions of the phone itself which is something apple will not allow. When I JB my iPhone I used the website GreenPois0n. What iPad are you looking to JB and what IOS are you currently running? If you have the new iPad you will have to wait like the rest of us, also if you have an iPad 2 with IOS 5.1 or the newest 5.1.1 you will have to wait as well. If you are running 5.0.1 you are good to go with the JB. If you are looking to do it and do not want to do it yourself many people and places will do it for you usually for about $20. Just check craigslist (lots of people advertise that on there). Personally, part of the fun is doing it yourself and most programs are pretty easy to use.