http://www.top500.org/

#1 Tianhe-1A ; Rpeak = 4701 Tflops
http://www.top500.org/system/performance/10587

#2 Cray "Jaguar";  Rpeak = 2331 Tflops
http://www.top500.org/system/performance/10184

Combined total of Top500 supercomputers is 43673 Tflops
http://www.top500.org/lists/2010/11/performance_development

#0 Bitcoin Grid GPU/CPU ; Rpeak = untested, estimate 15106 Tflops
http://www.bitcoinwatch.com/