Currently reading - Amazon Queen by Lori Devoti
Here's an interesting challenge if you think other writers will steal your ideas. Rick Daley has a contest over at The Public Query Slushpile with real-live No Prizes stolen from the Marvel Comics vaults!
Seriously though, he's got a nice little exercise/experiment on creativity. Rick has posted a story outline. You just have to write a query letter and the first five pages of a novel based on the outline and e-mail them to Rick by 10PM EDT on May 28, 2010. He'll post each entry on the 31st, then launch a public discussion about the entries on June 4th.
Personally, I think Rick's experiment will show that it's not the idea itself, it's the execution that attracts the agents, editors and readers.