The Collaborative International Dictionary of English v.0.48:

Tasteful \Taste"ful\ (t[=a]st"f[.u]l), a.
   1. Having a high relish; savory. "Tasteful herbs." --Pope.
      [1913 Webster]

   2. Having or exhibiting good taste; in accordance with good
      taste; tasty; as, a tasteful drapery.
      [1913 Webster] -- Taste"ful*ly, adv. --
      Taste"ful*ness, n.
      [1913 Webster]

WordNet (r) 3.0 (2006):

tasteful
    adj 1: having or showing or conforming to good taste [ant:
           tasteless]
    2: free from what is tawdry or unbecoming; "a neat style"; "a
       neat set of rules"; "she hated to have her neat plans upset"
       [syn: neat, refined, tasteful]

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "tasteful":
   Attic, Ciceronian, aesthetic, appetizing, art-conscious, artistic,
   arty, beautiful, charming, chaste, choice, classic, clear,
   comme il faut, correct, cultivated, decorous, direct,
   discriminating, discriminative, easy, elegant, excellent,
   fastidious, finished, fit, fitting, flavorsome, good-tasting,
   graceful, gracile, harmonious, in good taste, limpid, lucid,
   mouth-watering, natural, neat, of choice, of consummate art,
   of quality, ornamental, painterly, pellucid, perspicuous, plain,
   pleasing, polished, polite, proper, pure, quiet, refined,
   relishing, restrained, rich, round, sapid, savory, simple,
   straightforward, subdued, tactful, tasty, terse, toothsome, trim,
   unaffected, understated, unlabored, unobtrusive, well-chosen