well, from what i can figure the vampire ram maps above the 24bit z2/ocs/ecs limit, so z2 boards should be fine? i've seen one guy bolt an ethernet card into his vamp'd up A2000 with no problems, and heard someone else say they had no issues with their A590+2Mb.
but once you have fast IDE, and 128meg, doesn't that make most reasons for having a hard card redundant?
just so long as it's device controller is not called "scsi.device" you should be golden.
i also have an HD8+ with 4meg, and a vamp 500 on order. so yeah, would be interesting.
also the 286 card could possibly be outgunned by PCtask purely in software? just thinking...