The Google search appliance is one of the earliest and most successful hardware-based search product on the market. The search appliance comes in different flavors, one for each company size.
The latest member of the search appliance family has been presented yesterday by Google: the Google mini has all features necessary to satisfy the needs of small and medium sized companies. Now these companies can use the Google mini to add search features to their arsenal of tools to handle the ever growing amount of information they have to handle.
Link via Google enterprise blog
Link via Google blog