i pad, apples new tablet is out on the market now

So the primary question for this article is, do you type it i pad or iPad? I have seem many different version of the way people type the name of this new tablet PC. On Apple's official website, many people are simply typeing it as iPad, but I have come across quite a few sites where people type i Pad. These are the people that woudl probably type i phone and i pod. It is not a big matter obviously, but when people start to type it with the space, it is some times confusing when reading an article. Which is your preferred way of tying ?