That was simple...

Amazing what someone who has been working with Apache w-a-y longer than me can come up with once he puts his mind to it. Our resident Apache geek, who helped me get the myweb service up, by the way, came up with a way to provide 'myweb-like' service out of the shared volumes if we so wish. The main problem he had was translating his apache-on-solaris knowledge into apache-on-netware, which is different. To get things to work the way we wanted to took all of one line:

AliasMatch ^/deptweb/([^/]*)(/.*)?$ "WUF-FACSHARE/FACSHARE:/$1/deptweb/$2"

And that worked. Unfortunately 'deptweb' was running afoul of the bit of mod-rewrite magic I do to make URLS like http://myweb.yadda.wwu.edu/riedesg into http://myweb.yadda.wwu.edu/~riedesg in the back so mod_edir can pick it up. The magic of which can be found here. The fix for this was to add another RewriteCond/RewriteRule pair for "deptweb". Once that went in, the AliasMatch actually matched and all seems well with the world. We'll see if/when this service gets announced.