10. The system of claim 9 , said program code further comprising: program code for, in the event said received list of documents currently opened by said first user does not include a previously listed document identifier contained in said previously received list of documents opened by said first user, determining whether any other user currently has a document opened that is identified by said previously listed document identifier; and program code for, in the event that another user currently has said document opened that is identified by said previously listed document identifier, removing said user identifier of said first user from a currently accessing users list associated with said previously listed document identifier.
10. The system of claim 9 , said program code further comprising: program code for, in the event said received list of documents currently opened by said first user does not include a previously listed document identifier contained in said previously received list of documents opened by said first user, determining whether any other user currently has a document opened that is identified by said previously listed document identifier; and program code for, in the event that another user currently has said document opened that is identified by said previously listed document identifier, removing said user identifier of said first user from a currently accessing users list associated with said previously listed document identifier. 11. The system of claim 10 , said program code further comprising: program code for, in the event that no other user currently has said document opened that is identified by said previously listed document identifier, removing an entry from said list of currently opened documents, wherein said removed entry contains said previously listed document identifier.