The 10/98 issue of _Electronic Engineering Times_ has an article on Irvine Sensor Corporation's efforts. The EET article gives a bit more meat about the time frames and performance and the developmental objectives that might be pursued once a petaflop machine is constructed. A reference to five to ten year time frame for achieve 10 PFLOPS was stated.
http://www.eetimes.com/story/OEG19981013S0010