This is a (partial) list of US-related wikis Feel free to develop - including whether 'open for adoption', 'further editors welcome' and 'tidying up required/other problems.' Some wikis may get closed due to inactivity - but it is possible to revive them. When there are some 15-20 entries for a given topic (historical period, states etc), create a separate page, linked from here, and develop thereon.