Look at the monkey!
I'm also working on a roleplaying setting which takes place in the aftermath of a civil war that leaves The United States...well, not united. And there are no guns. But there are trains. And cannons. It's a work in progress.
But hey, io9 put up an article asking about the coolest sword in fiction. My money is on Scott Pilgrim's sword of love, because it's a manifestation of Scott's own growth, but Frostmorne probably gets it on a technicality.