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Elsewhere in Washington, page 460 of NASA's brand new budget request:

http://www.nasa.gov/pdf/168652main_NASA_FY08_Budget_Request.pdf

suggests that prize requests for upcoming years have dwindled to merely $4 million annually. At least the Centennial Challenges program hasn't been eliminated though.

Hopefully momentum will nevertheless pick up for the paradigm shift in procurement with the Congressionally re-iniated "H-Prize" bill for the Dept. of Energy:

http://cosmiclog.msnbc.msn.com/archive/2007/01/24/41211.aspx

Meanwhile, DARPA's DOD continues to fund its own competitive prize(s).
The DOD, NASA and the DOE represented the U.S. federal govt's 3 largest procurement budgets at least a few years back. The more different agencies embrace the competitive prizes reform, the harder it could be for the NASA pork constituency to continue backing away from it at taxpayers' expense. Interestingly enough, now there are two different political parties in power in D.C. and competing for votes. Pork-reduction is supposedly on the agenda of both in the quest for votes in 2008. I guess we'll see how much they really mean it...