Velong was the location of one of Lord Yu's secret bases. Lord Yu and Daniel Jackson, posing as Yu's servant Jarren, mentioned the place in passing (5.15 "Summit Part 1"). Jarren's lo'taur predecessor unwittingly revealed its location in idle conversation with Morrigan's servant. That lo'taur was destroyed in the surprise attack on the base which followed.
--Aurora 08:00, 14 June 2006 (PDT)