In June 2001, the query automated entry system at rootsweb was unilaterally revised into a "county" board under the MyFamily.com/Ancestry.com (which adopted the rootsweb organization) As a result all the queries entered since Jan 25, 1998 are in their new system. They now requrire a (free) registration to post queries, but one advantage of this to you is that with a user name and password you can now edit any queries that you post.
There is also a general unknown Maryland county query fourm available. which is for cases where the county the persons of interest were in was not known.
Go to the New Rootsweb Query Board Fourm for Howard County Genealogy