Revo iSkin

I don't think it will fit since the height and depth are different. It will be a little to big on the iPod Touch. If you want to protect it until a case is made for it you could get a BSE for the time being or just use a slip case to protect it. www.sfbags.com has one and the iPod 5G slip case fits.

iPhone Size and weight
Height: 4.5 inches (115 mm)
Width: 2.4 inches (61 mm)
Depth: 0.46 inch (11.6 mm)
Weight: 4.8 ounces (135 grams)

iPod Touch Size and weight
Height: 4.3 inches (110 mm)
Width: 2.4 inches (61.8 mm)
Depth: 0.31 inch (8 mm)
Weight: 4.2 ounces (120 grams)