The Collaborative International Dictionary of English v.0.48:

Taleteller \Tale"tell`er\, n.
   One who tells tales or stories, especially in a mischievous
   or officious manner; a talebearer; a telltale; a tattler.
   [1913 Webster]

WordNet (r) 3.0 (2006):

taleteller
    n 1: someone who gossips indiscreetly [syn: tattletale,
         tattler, taleteller, talebearer, telltale,
         blabbermouth]

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "taleteller":
   a tale-bearing animal, anecdotist, busybody, fableist, fabler,
   fabulist, fictionist, gossip, gossip columnist, gossiper,
   gossipmonger, mythmaker, mythopoet, narrator, newsmonger,
   newspaperman, novelettist, novelist, quidnunc, raconteur, reciter,
   recounter, relator, reporter, romancer, romancist, rumormonger,
   sagaman, scandalmonger, short-story writer, spinner of yarns,
   storier, storyteller, tabby, talebearer, tattler, tattletale,
   teller of tales, telltale, tittle-tattler, word painter,
   yarn spinner, yenta