Please don't kill me if this is not the right place to post my ideas for the new version but I don't know where to place it instead.
1. Default query
My thought is that when you have for example a table t_persons and you place a query in the bookmark-table with the same name as the table that this query should be executed instead of the "select * ..." when you click "browse"
2. Execute button (or link) for bookmark-table
That means that I think it would be nice if you browse the bookmark table that you get an additional button or link in each line to execute the defined query
Regards
Igor