Norvig's codes are very educational. Unfortunately :) Peter long since stopped updating them; in JScheme, he mentioned the wish to move to R5RS standard, but ot

Norvig's codes are very educational. Unfortunately :) Peter long since stopped updating them; in JScheme, he mentioned the wish to move to R5RS standard, but other, more important things intervened. Are there similar codes for more recent Scheme's - with some more advanced capabilities, like hygienic macros and full continuations - demonstrated?