I have some basic questions about the iPad before I buy one - if I buy one. 1. Is it extra to have the Internet connection with it? If so, do you pay for a data limit? 2. Does it come with WiFi and 3G connectivity, or are they separate contracts? 3. Is a long-term contract required? 4. Do you get a lower iPad rate with a contract? 5. Is it as expensive as an iPhone as far as monthly rates? Thanks.