I don't, and don't personally know anyone who does (weather's not good for it here), but I remember seeing that the folks at Agama International do:
link
Maybe you can get some info from them.
I've always wondered how you can keep a burrowing species outdoors - allow them to burrow but not to escape. Maybe enclosed bottom with giant craggy rockpile?
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Torey
Eugene, Oregon, USA
1.1 Uromastyx Geyri (Joe and Arthur)
2.0.1 Uromastyx Dispar Maliensis (Tank, Turtle, and Spike)
1.2 Anolis Carolinensis (Bowser, Leeloo, and Sprocket)
0.1 African Dwarf Frogs (Sheila)
1.0 Betta Splendens (Mr. Miagi)
1.1 Felis Domesticus (Roscolux and Jenny)
