>You may be aware of the PLOB (Persistent Lisp OBject) system ...

 That is good news. By Allegro, do you mean the PC and the Unix version?

Francis,

We are just working on the Unix port, on both Sun & SGI systems.  None of us
know very much about PCs.  I assume that the client (LISP) side would be
pretty much the same, but I think there might be significant effort required
to port the server (a database backend written in ANSI C and based on
POSTORE) to a PC.

Larry