  We present new BVIc photometry for 350 Pleiades proper-motion members with 9
< V < 17. Importantly, our new catalog includes a large number of K and early-M
type stars, roughly doubling the number of low-mass stars with well calibrated
Johnson/Cousins photometry in this benchmark cluster. We combine our new
photometry with existing photometry from the literature to define a purely
empirical isochrone at Pleiades age (~100 Myr) extending from V=9 to 17. We use
the empirical isochrone to identify 48 new probable binaries and 14 likely
non-members.The photometrically identified single stars are compared against
their expected positions in the color-magnitude diagram (CMD). At 100 Myr, the
mid K and early M stars are predicted to lie above the zero-age main sequence
(ZAMS) having not yet reached the ZAMS. We find in the B-V vs. V CMD that mid K
and early M dwarfs are instead displaced below (or blueward of) the ZAMS. Using
the stars' previously reported rotation periods, we find a highly statistically
significant correlation between rotation period and CMD displacement, in the
sense that the more rapidly rotating stars have the largest displacements in
the B- V CMD.
