Watermark IT,
We were in a very similar situation. The long and short of it is that, as a private company, you would fall into the TLP category. This means that you are NOT eligible for the concurrent use model, (simialar to ACAD's network licensing model).
That type of thing, (which I find extremely disappointing), is only available to CLP customers. CLP customers are, for the most part, universitites and educational organizations.
Adobe's attitude towards this is pretty much, one machine = 1 purchased license.
As a "side note", when you purchase licenses under a TLP agreement, you get a different media kit than if you buy retail, (off the shelf). Each TLP agreement comes with 1 serial number. If you install using the TLP media, and the TLP serial number, there is no "activation" process. It is your responsibility to be manage your own licenses, (or number of machines that you have the application installed on).
If you buy 5 licenses today, under a TLP agreement, you will get 1 serial number. If you get 5 more in the future, it will be under that same TLP agreement, and you will use the same media and serial number.
