I have just published a 2. release of the Farseer simple samples / tutorial(s) on codeplex.
The new release includes the following:
Demo1
Basic application with a falling yellow box.
Demo2
Controlling the box with the keyboard. This includes the KeyHandler.cs from the original Farseer Physics Engine.
Demo3
This demo introduce Geometry and Vertices, which are used to keep track of collision between the two yellow boxes in this demo. The boxes have different mass.
Demo4
This demo adds a little more complexity as we here use an interface called IUpdateable. This is done as we now have two different types of classes that need to be updated at the gameloop. We both have the PhysicsBox from all the other demoes and a new FixedLinearSpringBrush, which is used to draw a line. In this demo you can click one of the boxes and drag it by moving the mouse and holding down the left mouse button.
Enjoy