My worst fears were realized... I checked the gravity this morning and almost could not believe it- it was still fermenting and the airlock was bubbling at about 10-12 bubbles/minute. I racked it to secondary, but is there a way to generate some sweetness again without starting a second fermentation.
If it's blurry, the fg is 1.002
To avoid the hydrometer-calibration questions, here it is in tap water.