FWIW, I've actually been able to use my Astra 3450 with VistaScan 3.7.5 from within Classic. Also, despite what they'd said before, Hamrick Software did add support for some USB UMAX scanners. So maybe there is still hope.
I'm sure Epson and Canon are just happy as peas in a pod over UMAX's lousy support. Certainly UMAX has lost a customer in me.
tooki