Here are some useful links if you're looking for inspiration in the style of art deco.
internationalposter.com
Fabulous poster art site, with seemingly exhaustive list of art deco posters – loads of inspiration with lots of Cassandre!
pandorasbox.com
Home site of the Louise Brooks society: extensive picture gallery of one of the seminal icons of the art deco era
www.kino.com/metropolis
Site launching the reconstruction of Fritz Lang's 1927 art deco masterpiece
nyc-architecture.com
A fabulous on-line collection of images of what is possibly the most beautiful skyscraper ever constructed: the Chrysler Building
greatervancouverparks.com
The best I've found of 355 Burrard Street, The Marine Building in downtown Vancouver. Better than the Chrysler building?
www.sjsu.edu/faculty/wooda/miami
Post-war Miami art deco is a bit "Disney goes Deco" for me, but still great for inspiration.
cristallalique.fr
Lalique crystal continues building on its heritage of stunning art deco form and line
claricecliff.com
The best site I've found for showing off a pretty definitive gallery of Clarice Cliff's highly influential art deco
shapes and paintings
filmposters.com
Has good collection of silent era film posters
perfessorbill.com
Take a look at this guy's collection of sheet music covers from the 1920's and 30's – some amazing stuff!
And it plays the music too!