Ramblings of a Great Khan blog has extended the deadline through the weekend for his Roman-themed adventure design contest.
NEED AN IDEA?
Try my 2-page d30 Adventure Seed Generator (Part I is here, and Part II is here). There's also my post about Roman-themed adventure ideas.
NEED A MAP?
For a dungeon, there's always Dave's Mapper.
For a city or town, use Inkwell's Random City or Random Village Map Generators.
For wilderness map, try Isomage's Wilderness Map Generator.
Not sure what you want? Try Paratime Design's Creative Commons Licensed Cartography site.
NEED SOME ROMAN MONSTERS?
How about the cacus (a fire-breathing giant), or the striga (a sort of vampiric harpy). Also see this post from the Wizards site regarding the Roman Empire as a D&D setting.
NEED SOME NAMES FOR YOUR NPCs?
Try Ted's Roman Name generator (just plug in your name, or somebody else's). There's also the Roman Name Generator at fantasynamegenerators.com