  With the completion of the first cubic-kilometer class neutrino telescopes,
IceCube, the race for the discovery of the first cosmic high-energy neutrino
sources enters into a new phase. The usage of neutrinos as cosmic messengers
has the potential to significantly enhance and extend our knowledge on Galactic
and extragalactic sources of the high-energy universe. This article gives a
short review on the status of neutrino telescopes and their sensitivities
concentrating on point-like sources. It discusses the current upper limits on
neutrino emissions and their implications for models of different source
classes.
