Rather than calling it Windows Presentation Foundation, Windows Communication Foundation, and Windows Workflow Foundation... ( it's too longgg !!! )
OR
Rather than calling it with their abbreviation, WPF - WCF - WWF/WF ( DAMN !!! We must spell 3 letters, how annoying !!! )
Let's pronounce it with :
WCF = WinCom
WPF = WinPrez
WWF/WF = WinFlow
This is the real posting
http://weblogs.asp.net/jgalloway/archive/2006/06/01/Make-MS-codenames-cool-again_3A00_-WinCom_2C00_-WinPrez_2C00_-WinFlow.aspx
It's not that good but it's better...