Tonight, if you're in Los Angeles, stop by the Electronic Orphanage at 975 Chung King Road and witness the third installment of "Siggraph Nights," a preview of the net art component of the Tirana Biennale, entitled "10 Hours," which opens in Albania next month. Curator Miltos Manetas has assembled intriguing Web sites that range from the home pages of new media theorists (like Lev Manovich, author of the recently released book "The Language of New Media") to online art and design projects. The series continues through August 19th. It's for nightowls only: the events begin at midnight and end at 4 AM each night.