FOR two weeks, Nader Taher has been incarcerated in the Regina Coli, a 500-year-old prison in downtown Rome. Taher, a nominee for Governor of Riau, has recently been allowed to meet with an official of the Indonesian embassy in Rome. Otherwise, he just spends his days staring at the aging floor tiles and cell bars. Boredom has already set in. "He is ready to be extradited to Holland so that everything can be put on the table and he can defend