What happens to the stimulus after the money runs out?

With so much buzz built up around the stimulus, especially now that awards are finally being made, there's disturbingly little being said about what happens after the money runs out.

The only recent discussion I've seen is this great call to action from Charles Benton and Dr. Kate Williams about "Why We Must Measure the Results of the $7.2 Billion in ARRA Broadband Funding..."