the sony ericsson p900 has two processors:
32-bit RISC ARM9 156 mHz (the same as p800)
But according to the official site "The P900 is geared up with two powerful processors". We don't know the type or speed of the second processor yet, but it's probable that its function is to help top multimedia applications like fullscreen video playing or 3D gaming OR maybe, as seen in other recent smartphones, it's just for phone/voice functions only
i got this from *www.clubsonyericsson.com/en/products_p900_p800comparison.shtml
but this discussion abt fones should b in another post i think