A newsgroup posting by Frank Durda IV with a wealth of information about the VIS development era
A database posting of the VIS running on MAME including specs, etc.
The Computer Bargain Store (aka oldsoftware.com) most likely has the world's largest remaining stock of Memorex VIS software, as well as a limited amount of peripherals. Check them out if you're looking for VIS items for your collection (or, a large assortment of goodies for systems other than the VIS)
A Google newsgroup post including some of the most common and trusted feedback from Frank Durda IV.
Proclaimed as "The biggest and oldest video game database about any video game on any platform", UVL has a section on their "Platforms" page dedicated to the VIS.
Tech enthusiast "Foone" has documented some great analysis on the VIS, and the SAVE-IT card
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