I've read several recent articles on an apparent big band revival and composer Darcy James Argue's name always seems to be at the forefront of the movement.
His ensemble, Darcy James Argue's Secret Society, has just released its debut recording Infernal Machines to rave reviews.
Argue describes the music made by his 18-piece group as "steampunk big band." I hear it as a combination of rock, classical and jazz music that will hopefully tune a younger generation of listeners in to instrumental big band music.
The composer's blog also serves as the band's website and there are a ton of free mp3s of live performances available. If you like what you're hearing, support the musicians and purchase the album!