Depends on how it's "broken" If the connections on the inside are frayed, then you're probably screwed. If it's just sheared or cleanly cut, you can try to peel back the casing and get a circuitry voltmeter and remap the connection. With that said, that level of electronic repair is best left up to the professional, who usually won't do it regardless of warranty because it's easier and cheaper to replace the hardware. I feel your pain, but the best thing to do would be invest in a new tablet, perhaps with a extended warranty if you carry yours around a lot.
Hm, if the cord has come free from the tablet then you need to send it back to Wacom to get it fixed (not Radio Shack or some computer place, it actually needs to be sent back to the manufacturer. You can get a box from the post office, make sure you pad it well). You can call them or do customer service through their website.
Last I heard, they will replace the cord for a fee if you send them the tablet. But I have no idea what that is, so make sure to ask. Last time I checked it was around $100 but that was a really long time ago.
Ah okay, I just sent the model number to a wacom representative to get a price estimate. Seems like sending it back to wacom is the best solution even though its going to cost me a bit ); Thanks for your reply!