They claim this can reach Alpha Centauri in two weeks and it will be ready in about two years.  As a side comment, especially for those of you who have been reading "Stardust", Pluto will move from the sign of Capricorn to Aquarius, the sign of humanity and technology, ruled by Uranus.  According to a professional astrologer, this will be the beginning of a "Star Trek World" where we will see technology that you are familiar with from that show.  This is one such sign of such. NASA's warp drive