Apple finally announced the exact date of iPad availability in the U.S.: It's Saturday, April 3, for Wi-Fi models, while models with both Wi-Fi and 3G will be available in late April.
As far as other countries go, all models of iPad will be available in Australia, Canada, France, Germany, Italy, Japan, Spain, Switzerland and the UK in late April.
If you're interested in pre-ordering your iPad, you can do it from March 12 onwards; U.S. customers can pre-order both Wi-Fi and Wi-Fi + 3G models from Apple’s online store or reserve a Wi-Fi model to pick up on Saturday, April 3, at an Apple retail store.