This just in, from Demode (which means most of you already know about this):
The 18th Century Notebook
A vast and huge consolidation of 18th c. clothing from across the webiverse. There are sections for men's, women's, and children's clothing, compiling images of extant garments from various museum collections, as well as paintings and fashion plates, all organized in an easy-to-use, easy-to-find manner. Go, see, be inspired, create!