Here are some different items that you can have customized:
Custom Furniture
One of the reasons that I love Ethan Allen is because you can customize their furniture. Like one of their chairs? Pick from one of thousands of fabrics. Picked out a pink sofa or chair? Then why not paint the interior of a library bookcase to match it?
Monogrammed Gloves - I saw these on Oprah's Favorite Things and they were definitely a favorite for me.
Luggage
The navy and white bag is no longer available but a similar bag can be purchased here, the Keepall 50 is from here.
Design your own suit or shirt at Brooks Brothers here.
I am currently waiting on two pieces of custom made furniture for the study at our home in Georgia. It's fun to design what you want, but the anticipation is killing me!