I could be wrong but I think dbo means dbo. Full rights on the database.
You might be able to get around it on 2005 but assigning dbo to a schema on
the database that doesn't include the two tables. AFAIK, it cannot be done
on 2000.
Yes, dbo means dbo, but db_owner does not mean dbo. Db_owner is security
role, dbo is a user and a schema.(Although there is also a schema called
db_owner, it is not recommended to be used.)
Jamie is correct that you cannot give put a user in the db_owner role, but
deny two tables from her. If the user was in the db_owner role, she could
just regrant herself the permission, in any case!

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HTH
Kalen Delaney, SQL Server MVP
www.InsideSQLServer.com
www.SQLTuners.com
>I could be wrong but I think dbo means dbo. Full rights on the database.
> You might be able to get around it on 2005 but assigning dbo to a schema
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