For those of you who still haven't gotten started with extension methods here's a quick writeup'n'sample

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input;

namespace XNAFAN
{
public static class MouseStateExtensionMethods
{

///

/// The current MouseState /// The mouseposition as a Vector2
public static Vector2 GetPosition(this MouseState mouse)
{
return new Vector2(mouse.X, mouse.Y);
}
}
}

This way you don't have to convert x and y every time along the lines of
MouseState mouseState = Mouse.GetState();
Vector2 position = new Vector2(mouseState.X, mouseState.Y);

Instead you just add a reference to the code with the extensionmethod and this enables you to write:

Vector2 position = mouseState.GetPosition();

Nifty - eh...?