1 million.  That’s the number of iPad sales Apple has reached as of Friday, the same day that the 3G version was released, according the company,

“One million iPads in 28 days–that’s less than half of the 74 days it took to achieve this milestone with iPhone,” said Chief Executive Steve Jobs, who noted that “demand continues to exceed supply.”

Gene Munster, an analyst with Piper Jaffray estimates that Apple sold 300,000 iPad 3Gs over the weekend.  And while the device itself has experienced huge early sales,  iPad users are also heavily investing in apps and books for the iBooks application having already downloaded more than 12 million apps and more than 1.5 million ebooks.

In his report, Munster outlines the following:

“Following checks at 50 Apple retail stores in addition to attending the iPad 3G launch at retail stores at New York and Minneapolis, we believe Apple sold about 300k iPad 3G units over the launch weekend (Fri., Sat. and Sun.) including 52 days of pre-orders. This compares to 300k on the first day (and 22 days of pre-orders) of availability for the iPad Wi-Fi model. Supply is limited, with 49 of the 50 stores we called on Sunday sold out of the 3G. Additionally, we believe Apple has now sold over 1m iPads, which suggests that our estimate of 1.3m iPad and iPad 3G models in the June quarter may be conservative.”

“While it is difficult to gauge, we believe this is due to both stronger than expected demand and lower than intended supply on the part of Apple. Near-term, this may put downward pressure on launch day/weekend statistics, but long-term we see it as a positive, as consumers are definitely interested in the iPad as a new category. In the first several quarters, we believe Apple will sell about 60% Wi-Fi only iPads and 40% 3G models.”

Apple last month said it would delay the international launch of the iPad because it has been unable to keep up with stronger-than-expected U.S. demand. It had planned to start selling the iPad overseas in late April but is moving the launch to the end of May.

Are now the owner of an iPad 3G?  If so, how do you like the device?  Did you hold out for the 3G version to determine how the WiFi version performed, or was your 3G pre-ordered as soon as you could do so?