I'm a big fan of the Demb Flip-It. The big thing it has going for it IMHO is the hinge, which allows me to control the amount of light going forward. I use mine all of the time when there is not a convenient wall to bounce from.
i have one for me and one for my wife. although it may be $30 for $5 worth of material,
it looks a lot more professional than anything I could make for $5!
my problem with putting anything on the flash is my goodness the combo get's so long.
from the bottom of the grip, to the tip of the flash modifier it is so long,
i knocked a champagne flute off the head table this past saturday
i was chimping or something, someone tapped my shoulder and I turned and crack!