I never really understood what WPF was, or what it did. I came across a program, though, that was written using the WPF and when I installed and ran it I was blown away. The program I downloaded was the Blu Twitter client, by Thirteen23 or something.
Seeing all the eye candy possibilities has me running through like 5 different programs, in my head, that I'd like to make. I may just have to put my XNA game development on hold for this.
Has anyone messed with WPF or written any neat looking apps?