Being a light-hearted discussion! There are the neutrino telescopes, of which AMANDA is my favourite (though only Super-K has detected (imaged is too strong a term) any astronomical object ... yet). There are the gravitational wave detectors, of which LIGO gets all the attention; no detections of anything astrophysical ... yet. Of those planned, I think http://lisa.jpl.nasa.gov/ [Broken] is the most exciting. While not exactly a 'telescope', the Pierre Auger Observatory might 'see' a point source before tooo long. AFAIK, the only other 'cosmic ray telescope' that might detect point sources is http://www.lofar.org/p/geninfo.htm [Broken], but it's very early days for that. Did I miss any?