Supposedly this is possible if you have a running Access server w/ DBD::ODBC.
If you just have the .mdb file laying around, there's no way currently to access it directly (that I am aware of. I don't use Windows however, so something may be possible in that case.) You don't specify what OS you're using, but under a UNIX-like OS, you can use mdbtools to dump the database to a flatfile and convert at your leisure.