At Rio we just have the good ole cap and gowns. Of course, if you're in any type of Honors fraternity you wear your respective cords. (in 2 years I'll be wearing my madonna red and blue!)
The Education students normally decorate their hats with apples and book pic's. The Nursing student always end up wearing a lot of silly string.
Some members of GLO's wear their org's sash's, but it quite rare.