I blogged about the Embarcadero License Center (ELC) and how to use it remotely. But I never went to the trouble of explaining the different kinds of license types that are available for Delphi (after all: I don’t sell these licenses, so why bother?). But somebody else just did: CodePartners blogged about Network Licensing in RAD Studio. It gives a pretty good overview.
I for one can definitely recommend switching from Named User to Network Named User licenses if you often need to install Delphi on a new computer (I need that rather often) or have a significant turnover of developers over the years.
Network licensing is supported in Delphi 2007 and later.