Hi guys,
I backed to Japan with no trouble :)
I uploaded following resource used by RubyConf2004 presentation.
Very thanks to RubyConf staffs and attendances.
Presentation Slide: www.atdot.net/yarv/RubyConf2004_YARV_pub.pdf
Benchmark: www.atdot.net/yarv/bench_20041002.txt