a tale-bearing animal
adviser
announcer
annunciator
authority
busybody
channel
communicant
communicator
enlightener
expert witness
gossip
gossip columnist
gossiper
gossipmonger
grapevine
informant
information center
information medium
informer
interviewee
monitor
mouthpiece
newspaperman
notifier
press
public relations officer
publisher
quidnunc
radio
reporter
rumormonger
scandalmonger
source
spokesman
tabby
talebearer
taleteller
tattler
tattletale
television
teller
telltale
tipster
tittle-tattler
tout
witness
yenta
blabbermouth
cat
backstabbing
confabulation
contriver
creatur'
glover
mischief-maker
needling
other
scandal-monger
sentimentalists
showbiz
spunky
tea-drinking