I've been fiddling around tons of art sites today. That's where I generally end up for inspiration for my game worlds, moreso than literature.
It looks like my upcoming Eberron play-by-post game is going to be a mixture of the following:
Studio Ghibli (brobdingnagian airships, constructed servitors, the darker elements of Nausicaa, Castle in the Sky, and Howl)
Lovecraftian pseudomythology, and Dreamlands
American McGee's Alice
Brazil and other Gilliam works
In general, dark fantasy, both in tone and visualisation.
Airships in general are uncommon. The more sea-going ship and boat-like airships are a common example of this sort of vehicle, but definitely not the preferred type. They were the earliest sort, many of which were converted to air travel from actual maritime vessels. Much more preferred are the larger, sturdier, and fully enclosed sort typified by the works of Miyazaki, though lacking wings. This type are far louder in operation, however, due to the greater power and number of the constrained elementals, the abyssal moans and screams of whom can prove highly disquieting.