As the first poster suggested, you can connect via USB cable to a PC and surf that way at he same time someone else is using the computer. Or if your PC doen't have bluetooth you can pick up a BT dongle for your PC connect that way as cables tend to be a bit on the short side.

I use that trick myself sometimes when I'm inside and the EVDO signal is poor.

Some of these phones can be fitted with wi-fi cards in the memory card slots but they are expensive and I don't know if the BJ can support one or not.