3Com Network Jack
What a clever (and deceptively simple) idea this is! Many times I've had a station where I've only had one ethernet port but for whatever reason I needed to have 2 or more. This little device promises to let you add extra ports on the fly and for a little over $100.
While it's advertised as an "in the wall" device I'm thinking I might actually want to use it as a portable - to temporarily add extra ports to a location for the duration of a finite assignment.
I'm going to request one in my next budget...