to ATP, and let's hope we can help. Where are you located, sonofagun? If somewhere north, it may take more sun and heat to stimulate the plant to put up new green spikes. If the trunks are still solid, don't give up on it until the end of the summer! It may still sprout and/or it may put up new shoots from the root as well.
Keep it warm, (a south-facing protected corner outside if you still can't bring it indoors) and give it a good thorough watering (until water comes out the bottom of the pot) every week or 10 days depending upon how warm the weather is. Even in the desert where these things grow naturally, they do get rains sometimes. They grow in people's gardens here, and we get rain every day in the summer. As long as it's draining well don't be afraid to water it.
For future reference, a guideline is to never prune more than about 1/3 of the green growth off any plant at one time. Since you only had two trunks, obviously you had to prune at least 1/2, but the plant would still have some green leaves to make food for itself if you'd only cut one trunk, then waited for the cut stump to sprout before cutting the other.
