I think I read somewhere that it's luster dust on the fondant.
Hope that helps!
Sammy
their was a post on here that some people had asked colette question and that was one of the question:
Colette, how do you get the shine on your fondant?
<Colette_Peters> The fondant is painted with luster paint or you can spray it with water to get it shiny.
i hope that helps
shaddi
I saw someone steaming their fondant to get it shiny on one of the recent food network cake competitions.
I think they used steam from a kettle, but can't remember.
I have tried steaming myself, and yes it is very shiny, but when it dry , it's not shiny anymore.. the shine goes away when it's dry. 
I wonder if there is any kind of a polish -or lacquer of some sort that could be brushed on. I always have problems with gumpaste flowers looking too dried out - but sometimes I dont' really want a luster-dust shine - just something that makes them look wet, tender and not dry back out - like water sprayed on.
I wonder if an egg-white based wash would do that.
Steaming "sets" the luster dust and petal powders and so on.
When I took somone's gumpaste flower class, they did steam the flowers to "set" the colors.
I don't know which icing is the one that is shining..maybe it's her butter cream?
I also wipe a little water across my fondant if I want it to "look" a little shinny.
I mix luster dust & clear vanilla extract or lemon extract to make my fondant shinny.
I've also used the fondant paint. It is very shinny~
I use walnut oil or flavored liquor mixed with luster dust.
How about using a glaze made with gelatine. I use it on my gumpaste flowers - 1/2 strength, and I am sure it could be painted onto fondant. There are recipe's for it in most cake decorating books. Allow to dry well.
another option:
edible spray lacquer
http://pastrychef.com/Catalog/edible_spray_lacquer_3582724.htm
You can also make gumpaste flowers and leaves shiny by putting a dab of Crisco in the palm of your hand, brush back and forth with an artists paintbrush and brush it evenly on the dried flower. The heat of your hand melts the Crisco slightly and adds shine to the gumpaste, but it only lasts for a few days, even with steaming it will dull in time. Don't brush too many times with the Crisco if you have used petal dust on the flowers or leaves first, it will cause the color to streak. You can buy spray lacquer for spraying on gumpaste items if you want to keep them as display pieces.
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