The Hubble telescope has found a new moon of Neptune, it's 14th (i must update my books on astronomy which lists Neptune as only having 2 moons!) Neptune's latest discovered moon is very small however, being just 12 miles in diameter. The new moon is currently called S/2004 N 1, which does not compare very well to the name of Neptune's largest moon Triton!
A proper name will be chosen for the moon however and will likely be drawn from Greek and Roman mythology. The moon is so dim that Voyager 2 did not see it when it made its flypast of the planet in 1989. This is due to it having a very dark surface like some of its fellow Neptunian moons.