A new version of the 1881 Canadian Census Database at Library and Archives Canada has been released. This includes "suggestions for corrections that were received from users in recent months". This is great news as it's frustrating to submit corrections and never see them. Good to know new searchers will benefit from this process. Altogether there are 4,278,327 records in this database.
Revised district and sub-district information has also been added.
This is one of the projects Ancestry.ca has assisted with. A similar database is available there.
FamilySearch.org also has an 1881 Canadian Census Index.