one solution, i think, to chipchamp's request would be to have "next in category"/"previous in category" buttons, in addition to the regular next/previous buttons, on every entry in a multi-format/multi-theme battle. this would facilitate easier voting a category at a time (which i found to be a useful technique for summar chipz).
EDIT: oh yeah, category means formats in this case. not like "shit in pants" and "produfunction" etc. :)