Microsoft Content Management Server - Standard Edition (MSCMS SE) has been available for a little while now, and there are many interesting use cases for this version, from a business and a licensing perspective.
The differences between MCMS SE and MCMS EE are pretty clear,
What is interesting, and good to note, is that the price of a license for MSCMS SE can be applied to your price for a subsequent upgrade to MCMS EE. <disclaimer>(Check with your MS account manager for specifics and details)</disclaimer>
This means that if your company has multiple sites that you'd like to manage the content of, or if your company consists of other companies, which each has their own site, you can implement a site on MSCMS SE to get a feel for it and then migrate to MCMS EE without losing that investment. It doesn't, unfortunately, let you apply the cost of two MCMS SE licenses to a single MCMS EE license... (Where does Santa Claus go this time every year when we need him?)