I split my time between NY and Vegas. When I'm in Vegas, I have it with me all the time; I tend to be "out and about" far more when in Vegas.
In NY, I'm much more of a homebody, so for the most part, I get by with the iPhone and my various Mac and Windows laptops and boxes in the house. But if I know I'm going to be out all day, the iPad comes with me.
btw, here in Vegas, I have seen other people using them. It helps to pass the time while sitting through long sessions of poker at the Bellagio. When the iPad first came out, Bellagio poker room staff was in a quandary as to whether or not to allow iPads to be used at the table (laptops are a definite no-no, phones, iPods, Nintendo DSs are all ok). Fortunately, the staff and I have a good working relationship, and I helped to convince them that an iPad was not a computer (even though we know it is

), and at least for now, iPad use is ok in the poker room. Hopefully it will stay that way.