I dont have a W30 these days but I still have my s750/60's. I think they can read w30 disks? Not sure if there would be so many folks still using a W30, maybe theres more still using their s range samplers. I still use mine....although havent in about a month.
Maybe if your intended site covered the s range as well you might get more people interested?
BTW, I still have a soft spot for the W30. Its what I learned sampling with....and it was amzing what could be done with 12 seconds of sampling time?...not sure about that one. I suppose it was one of the first workstations. I wrote many a tune on my w30....I might even have some disk lying around.
good luck