The specs are not "known", but they are so easy to guess.
They will be using an ARM core based on the A8 or A9 architecture, with 256mb RAM, most likely. Top screen will be parallelax 3D, bottom will be 2D. One analog stick.
My great friend Ray (The one who got me to the Street Fighter IV launch party) works for RagingNerds, and he offered to let me hitch a press pass ride to E3 with him, but I am gonna be in CO. FFFFFUUUUU