http://www.cnn.com/2008/WORLD/europe....ap/index.html
it would seem that the UAV was operating over Abkhazian airspace and was shot down by a Russian MiG-29 , based in the town of Gudauta in support of the local government.
apparantly Georgia bought 2, Elbit Hermes 450 from Israel this year - but both have now been shot down , the first on march 18th with parts pulled from the black sea and this one today;
it does begger the question - if this is the second shoot down , why only mention this one :P
oh wait they got a video of russia doing it