  We probed the local electronic properties of the mixed-valent Co(+4-x)
triangular-lattice in Na{x}CoO{2}-yH{2}O by 59-Co NMR. We observed two distinct
types of Co sites for x>=1/2, but the valence seems averaged out for x~1/3.
Local spin fluctuations exhibit qualitatively the same trend down to ~100 K
regardless of the carrier-concentration x, and hence the nature of the
electronic ground state. A canonical Fermi-liquid behavior emerges below ~100 K
only for x~1/3.
