HDSPe ExpressCard on OS X 10.5.8 with driver version 2.73: if I put my MBP 3,1 to sleep, on wakeup the system notifies me that the HDSPe Settings app has crashed and asks me to relaunch. On relaunch everything's fine. Also, the Card Stat on the menu bar still reads "Unknown Vendor / Multimedia Device".

Since there's now a notification and I don't put my MBP to sleep while a DAW is active, none of this is critical to me. But I thought you should know.