Though I'm not sure that anybody knows for certain, I saw that the iPad is due out the first week of April. Whether it's a runaway hit or not, the iPhone certainly has been. Do you have an iPhone/iPad/iPod app yet? Or, are you thinking about one? I'm using thirty or more of them on my iPod with Wifi. They're useful for all sorts of things.
There are vendors out there already doing apps for Realtors, so you should be investigating them for your future app. I've done one, and believe that it will be a great resource for my local real estate business in the future. Here's a profile of the iPad app vendor I chose.

