Update: Video Added
Nissan spoke about the NV200 concept a couple of months ago and promised that the van would be ideal for small offices. The company has surely kept its word, the Nissan NV200 does look pretty good for the job.

NV200 is designed for professionals on the move. A great feature is the customizable cargo area, with a unique pod that can be equipped to handle a variety of business needs. The pod can slide out when the van is stationary, and the cargo bay transforms into a mobile office. The pod is divided into customizable trays and boxes for efficient storage.
Currently, the NV200 to be displayed has been equipped to be of use to an ocean photographer, but since the cargo area and pod are customizable, it wouldn't be much trouble to transform this van for other uses.
[Source: Nissan]