The Galaxy Tab, is a very nice piece of hardware, but the price is a little steep for that type of device.
One of a number of advantages over the iPad, is voice calling, it can be used just like a mobile phone.
actually, the Galaxy Tab, is just a larger version of my phone, the Galaxy S.
But Westie is correct, there are going to be a lot of Android type iPad devices coming to the market in a rush.
Optus, have something similar, to the Telstra offer, but for $275
One thing to be weary of is, if you are going to get one, make sure it does WIFI, plus 3G