The three primes are 24 T/1.5, 50 T/1.3, and 85 T/1.3. It is interesting how the 50 and 85 are slower than the standard L series EF lenses, especially for such an expensive camera. They better be good, and according to planet5d, they are sharper than the L's.
Edit: Apparently I didn't know T stops and F stops were different; thus, the new primes are better. I apologize.
Quote from planet 5D live blog moderator "Real power of the Cinema EOS is the lenses - I kept saying how sharp the movies were!"