Jason Compton writes in comp.sys.amiga.misc:
I haven't seen anybody mention this yet, which sort of surprises me. Amiga history completists may find it interesting.
US Digital Communications, the company Viscorp became after giving up on interactive TV and trying to get into satellite telephony, has at long last gone out of business. The post-mortem is at http://finance.yahoo.com/quotes?s=usdi.ob&d=t or you can check your favorite stock info site by looking up the ticket USDI or USDI.OB.