Get an iPhone (or Droid), you can use it as a wi fi hotspot (additional charges apply of course). Also there is a wireless cellular router called a MiFi that does the same thing.
I have the wi-fi only IPAD 2. Can I buy something so I can access the internet when I'm traveling and not near a wi-fi spot. If so, could you tell me what it is and where I'd get it... I am a very basic computer user but I am enjoying the IPAD.