Neat concept, but didn't take off. I enjoyed playing it though. It was a change of pace.
Not a whole lot of items were produced, but they are usually readily available and relatively inexpensive. Most items can be had for under $10.00 but lots are the way to buy if you want a better price. There were two editions/versions. The original and S.I.
Here is a link to a site that has some info:
IO - The Modular Data Center Technology LeaderHere's a cool S.I. site:
http://www.spies-r-us.org/There used to be a lot more of them but they have faded away over time...