being a dbExpress newbie I wonder if there is a dbExpress driver for Microsoft Access?
I have had good results using the open source dbxoodbc driver for dbExpress.
The download has several demo projects that use access databases, so you should be able to get up and running in no time.
You can find it at http://sourceforge.net/projects/open-dbexpress/
I have only tried it with older versions of access, so I can't say for certain that it will work with office 2007 or newer.