We present the first evidence of the decay mode B_s --> phi phi
and a measurement of partial width and direct CP asymmetry for the B+ -->
phi K+ decay using 180 pb-1 of data collected by the CDF II experiment at
the Fermilab Tevatron collider.  We measure BR(B_s --> phi phi) = (1.4 +/-
0.6(stat.) +/- 0.2(syst.) +/- 0.5(BR)) . 10-5, where the last error is due
to the uncertainty on the B_s --> J/psi phi branching ratio used as
normalization, BR(B+ --> phi K+) = (7.2 +/- 1.3(stat.) +/- 0.7(syst.)) .
10-6 and A_CP(B+ --> phi K+) = -0.07 +/- 0.17(stat.)+0.06_-0.05(syst.).
We also briefly discuss prospects for studying other charmless B --> VV
decays at CDF.