Would you like to use your iPad as a phone integrated into your business’ phone network? It might be possible if your business is a Cisco shop with the right combination of hardware and software. Check out:
Cisco Mobile 8.0
This free iPhone app is also “compatible with” the iPad. So, while you may need to endure giant pixels due to screen doubling for full screen scaling, you may also be able to make full use of your Cisco IP telephone system.
This might enable to you to, for example, answer a call to your office phone while in Starbucks using their free WiFi hotspot, at home, or in a hotel with a semi-outrageous per night WiFi fee. Sound interesting to you? Check with your IT and/or network administration group at work.