In this 45 minute presentation first given at DAC 2008, JL Gray, member of the Accellera VIP TSC and author of Cool Verification (www.coolverification.com) looks at the verification interoperability problem by examining SystemVerilog interoperability between simulators and functional differences between competing methodology libraries.  JL will also discuss the likelihood SystemVerilog interoperability will move (unlike Santa and the Tooth Fairy) from myth to reality as a result of the efforts of the Accellera VIP TSC.