Hi Timothy,
AvailHSM (yes, currently a Wang product) uses a special HSM server which only 
runs on Novell (????!!!!???!!). Migration and recall is controlled by an 
external AvailHSM Novell server so when that server is down (quite imaginable 
for a Novell server :-) ) no recalls can be done from ALL file-servers! So it's 
not a product you should want!
Furthermore the prices (one can only buy the product) are extremely high!
I also think that HSM functionality should be supported by ADSM itself.
Kindest regards,
Eric van Loon