Apple has announced that iPad 3G will be shipped to all U.S. customers from Friday, April 30th. Apple is also taking all the steps to make the device available on Apple retail stores the same day, starting at 5 p.m. While the iPad with 3G connectivity will cost $130 more than the Wi-Fi models, the 16GB iPad 3G will cost $629 and the 32GB and 64GB will come with a price tag of $729, and $829 respectively.