John Liao has an interesting series of F# programming posts, with lots of samples. Many of the WPF topics are taken from Petzold's book Applications = Code + Markup: A Guide to the Microsoft Windows Presentation Foundation.

• Interactive exploration of .NET XML programing with F#
• Learning WPF with F#
• Learning WPF - Working with Brush Basics
• Learning WPF with F# - Adding Contents
• Learning WPF with F# - Working with Buttons
• Programming ASP.NET 2.0 with F#
• Working with ASP.NET 2.0 ViewState in F#
• Playing around with Workflow Foundation in F#
• Learning WPF with F# - The Dock and the Grid
• Learning WPF with F# - Canvas
• Learning WPF with F# - The Dock and the Grid and Problems with Static Readonly Fields
• Working with F# - DependencyProperty and static readonly field workaround
• Learning WPF with F# - Routed Input Events
• Learning WPF with F# - Custom Elements
• Learning F# with WPF - Single Child Elements