NASA today posted this notice. I'm not sure if the venue has been officially secured yet but here's what was released:
ACTION: Notice of Centennial Challenges 2009 Power Beaming and Tether Challenges.
SUMMARY: This notice is issued in accordance with 42 U.S.C. 2459f-1(d). The 2009 Power Beaming and Tether Challenges are now scheduled and teams that wish to compete may now register. The NASA Centennial Challenges Program is a program of prize contests to stimulate innovation and competition in space exploration and ongoing NASA mission areas. The 2009 Power Beaming Challenge is a prize contest designed to promote the development of new power distribution technologies. The 2009 Tether Challenge is a prize contest designed to develop very strong tether material for use in various structural applications. The Spaceward Foundation is administering both Challenges for NASA.