I guess it depends on how you want to use it. I use it mainly from the home, when I want to be outside, but we've been doing remodeling lately and it's been very handy since I didn't have access to my office. I think all the applications are cool, it allows you to do somethings faster than you can do on your computer. Ordering a pizza is really fast now!
Will you be using it from work and do you have internet there already, wireless might be an option. There's an application called "free Wifi" and it shows you all the hotspots near you even an application that shows you the hotspots when you aren't online. I'm amazed at all the hotspots nearby, maybe that will be enough for now, depending on how you want to use it. Unless you are using it for business and could take the monthly charges as a deduction the cost per month could be a little too much.