Brand New Nostalgia is the sketchblog equivalent of The Defenders, a non-group, if you will -- a loose conglomerate of artists doing that sketchblog thing of choosing a theme and then posting the results, originally at their respective deviantART accounts and Tumblrs, and now at their own website. They're making the leap into the physical world with a book they're seeking funding for through Kickstarter described as an "anthology consisting of some of the best pieces from the blog as well as all-new comic stories by each of the creators."
There's a list of the members' respective galleries here, and the most easily navigable place to see their combined efforts may well be at deviantART. There's some top-notch artists amongst their number who'll probably go on to big things. There's a representative selection of work from their site below.