A Vivato spokesperson confirms the ceasing of operations with Glenn Fleishman over at Wi-Fi Net News. Vivato is best known for the switched access point that was designed using phased-array technology and beam-steering to communicate intelligently with outdoor clients over 1 kilometer. There was also an indoor switch that would theorectically light up an entire office floor with a single access point panel. Although the technology and early demonstrations were very promising, the company could not meet performance and price demands in the fast-changing Wi-Fi market. Competitors quickly adopted 802.11g and MIMO to meet the increasing wireless bandwidth demands of enterprise users.
Vivato engineered an awesome technology for the private sector (phased-array is most often used in military radar systems) but it just never quite took off.