Wirelessly posted (The Dacia Sandero of data plan)
I agree with Dubdub -- getting a data plan helps to maximize the full potential of the device.
However if you are set on not having one, you should be able to use your device with wifi only. I didn't have a data plan when I first got my device and used wifi only whenever I could. Didn't have to take out the sim or any other workarounds. I didn't use any apps, just the BB browser and Opera Mini.