The Collaborative International Dictionary of English v.0.48:

Noteworthy \Note"wor`thy\, a.
   Worthy of observation or notice; remarkable.
   [1913 Webster]

WordNet (r) 3.0 (2006):

noteworthy
    adj 1: worthy of notice; "a noteworthy advance in cancer
           research" [syn: noteworthy, notable]
    2: worthy of notice; "a noteworthy fact is that her students
       rarely complain"; "a remarkable achievement" [syn:
       noteworthy, remarkable]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "noteworthy":
   absolute, appalling, astonishing, celebrated, certain, concrete,
   conspicuous, defined, definite, detailed, determinate, different,
   distinct, distinguished, egregious, eminent, esoteric, estimable,
   evident, exceptional, express, extraordinary, fabulous, fantastic,
   fixed, formidable, incredible, indescribable, individual,
   ineffable, inner, intimate, legendary, manifest, marked, marvelous,
   memorable, minute, mythical, noble, notable, noticeable,
   observable, of mark, outstanding, particular, patent, personal,
   phenomenal, portentous, precise, prestigious, private, prodigious,
   prominent, rare, red-letter, remarkable, rememberable, reputable,
   respective, rubric, salient, several, signal, singular,
   solipsistic, special, specific, striking, stupefying, stupendous,
   superior, telling, uncommon, unexampled, unforgettable, unique,
   unparalleled, unprecedented, unspeakable, unusual, wonderful