I have a
.mdb database file which originated from a MS Access Jet database.
Is the some way to view this database, and even better, a way to edit and export it?
You can try to install mdbtools and mdbtools-gmdb in order to get the mdb viewer for gnome.
I haven't used it myself, so i don't know if it's able to let you edit the database, but it gives you the option to export it, so maybe you can convert it to the oo-base version (odb).
I don't know why openoffice doesn't support it. I've read that is caused by MSDAO that cannot be installed in linux o/s, so only oo-base in windows can natively support it.
Anyway, you should give it a try i guess. I hope it helps a bit.