The Florida Museum of Natural History has a nice online type collections of historic period archaeological ceramics (1492-1850), complete with detailed search features.
With the support of the National Endowment for the Humanities, we are able to offer it on-line as a service to archaeologists, museum curators, material culture specialists, and anyone interested in historic period ceramics. The digital collection includes thousands of images of individual sherds, representing hundreds of different ceramic types. The site also includes an extensive searchable database of information about these specimens.
May I suggest a more distinct and attractive name for this resource, e.g., Historic Archaeological Ceramics Type Collection? The search page has a long list of criteria that can be used to refine searches, maybe a bit daunting at first. It is therefore a good idea to read the how-to page before attempting to use the database.