Where was Jesus's spirit during the two days between death and resurrection?

Mike's view: Jesus's spirit was in Abraham's Bosom (the place of comfort for OT saints awaiting the Messiah), and possibly also visited the other side of Hades — not to suffer but to proclaim victory over sin (cf. 1 Pet 3:19). Those who died before the full revelation of Christ were in that waiting place; Jesus's post-death visit brought them the proclamation of what he had accomplished.