Typically, as an evangelist for this technology over the past few years, the major reason for investment in the Enterprise CAL was based in two features: InfoPath/Forms Server and Excel Services. With the advent of the 2010 set, there are several features that I think make the uptake much more valuable for any business or organization.
For the most part, organizations that invested in SharePoint, or had SharePoint CALs as a part of their Enterprise Agreement, were taking advantage of the Standard features of the product. Powerful, yet inexpensive, as far as enterprise content management systems go.
Since my most popular blog post of all time happened to be the one on licensing for SharePoint 2007, I thought it may be valid to put together some information for people trying to understand how to position SharePoint 2010 in their enterprise (read: figure out which edition to purchase).
This is going to be several articles, focusing on Foundation, Standard, Enterprise, Internet Sites and Online.