If the royal wedding re-ignited your enthusiasm for horse drawn carriages, you may want to start collecting miniature examples. Jeanne has posted a range of vehicles for model horses along with tips on what type of horses to use for various types of coaches and carriages, and how to get started using model horses (or dogs or goats) with sleighs, coaches, or utility vehicles.
For model builders itching to get started, a favorite book is of course Making Model Gypsy Caravans by John Thompson. Be prepared to become a wheelwright! Proper horse drawn vehicles need more than laser cut wheels!