What is Dieselpunk?
The short answer may be... an idealized, somewhat different view of the 1920s through 1950s, with plenty of era view of how technology could have changed the era, albeit with the influence of that time's style.
There are plenty of resources, and the genre is still growing by leaps and bounds, but to whet your appetite to learn more about Dieselpunk, please continue to...
Dieselpunks.org - the "ground zero" of Dieselpunk discussion online, at: http://www.dieselpunks.org/
The Cafe Metropole - The Gatehouse's outstanding forum, at: http://www.ottens.co.uk/lounge/viewforum.php?id=11
The Dieselpunk44 blog, penned by a well know Dieselpunk scholar, Mr. Larry Amyett, at: http://dieselpunk44.blogspot.com/
The Dieselpunks blog, penned by the resident professor of Dieselpunk, Lord K, at, http://dieselpunks.blogspot.com/
The Traveller's Steampunk Blog's Dieselpunk works, at: http://daily-steampunk.com/steampunk-blog/category/dieselpunk/
(and yes, much more to come!)