Al Kaplan - Miami, FL , Mar 14, 2007; 10:36 a.m.
Outside I use straight on flash. Unless the background is very close you're unlikely to get disturbing shadows on it. Without nearby surfaces above and to the sides a Stofen or similar is just eating up light and batteries. Using an umbrella or soft box would be better for nearby subjects but it's doubtful that your clients would notice the difference.
Indoors I keep a a rubber band around the head of my Vivitar 283, which holds half a dozen buisiness cards on the top of the flash, out of the way. When doing a bounce I pull one half way out and bend it slightly forward to kick a bit of fill into the shadows. When someone asks for a card I give them one right off the flash, no fishing around in a pocket.