I don't know of any way to access and Access databased directly from Unix, however if you have a networked Windows box available, you can use the
DBI::ProxyServer module from CPAN in conjunction with <a href='http://search.cpan.org/search?mode=module&query=DBD%3A%3AODBC>DBD::ODBC to set up a simple database server for the Access database on the Windows machine. You can now use the
DBD::Proxy driver in a script on the Unix side to access the database just like you would any other DBI compatible datasource. Its ugly, round about solution but it works.