Steinberg has announced that it is 'reviving' a pair of discontinued products, the MIDEX 3 & 8 USB MIDI interfaces:
Throughout the long history of Steinberg, many products have come and gone, many have been superseded by new variants, others have been dropped completely. Once in a while, however, some of our developers like to dig up one of these long forgotten gems and polish it ready for current operating systems.
As these revived products remain discontinued, their updates are not officially supported. Updates for discontinued products are sporadic as these are voluntarily provided by our engineers in their free time.
New drivers for the MIDI interfaces are available at the Steinberg site.