Although we don’t have the exact release dates for the iPad, there have been some rumors floating around. Examiner reported that as per one of the Apple Store Managers, the device will be accessible to store employees as early as March 10. It also seems that the standard edition (non-3G) will be released to the public on March 26th, while the 3G edition is not coming out until April end or May.
You can also expect the first iPad commercial to be aired on March 15th, which will highlight the e-book capabilities of the device.[source: examiner.com]