Although nobody really uses the program for which this technology was initialy created - Microsoft Frontpage - there are still programs that use the FPSE. Like Visual Studio .Net uses it to publish a website/webservice.
With the new IIS 7.0 most developers will know about the “publish problem” from vs.net to an IIS 7.0 web server, because of the different meta system that come with IIS 7.0 this vs.net feature stopped working “properly”. You could choose for the traditional XCopy and in vs.net 2005 for publishing through FTP. There is also an option to turn on backward IIS 6.0 compatibility in IIS 7.0 for legacy systems.
Now the IIS 7.0 team is releasing the first beta of the FrontPage Server Extensions for IIS7:
Overview
Microsoft and Ready to Run Software have released a beta version of the FrontPage 2002 Server Extensions (FPSE 2002) for Windows Server Code Name “Longhorn” and Windows Vista.
Features
This version of FPSE 2002 introduces no new functionality, and is essentially the same version that was created for Windows Server 2003 that has been updated to work on Windows Server Code Name “Longhorn” and Windows Vista.
Benefits
FPSE 2002 enables web hosters and developers to author their web content on servers or workstations that are running IIS 7.0 on Windows Server Code Name “Longhorn” and Windows Vista.
