Hi Sven,
I don't know if you or anyone else is interested, but I have implemented xml and sexp serialization/deserialization of simple arrays -- I needed it for an app that uses cl-prevalence. I've attached the patch.
BTW, I would like to say that cl-prevalence is fantastic. We've been using it for five non-trivial (>25 classes, avg. 3000 instances per class) webapps without a hitch for almost a year now.
Regards,
Mike
-- Michael J. Forster mike@sharedlogic.ca