I have to disagree. Keep that lightsphere on there. It DOES bounce the flash. In every direction. Much better than a bare speedlight.
And I will have to disagree with you :-) Any kind of Gary Fong-ish attachement is nothing but a WASTE OF BATTERY LIFE. Instead of using the battery power to hit the ceiling as hard as you can, you are dispersing the light all over the place for no reason.
It is the ceiling that will make your light source nice and big, and thus beautiful. Other flash related comments:
- Gel the flash with orange filter and cool down everything via WB so it's nice and even
- Use SHORT lenses when bouncing flash. If you are bouncing from across the room with 85mm on your camera, flash will look flat and ugly. To get the "I can't believe it's not softbox" look, you have to be close to the subject. I only use 35mm when bouncing flash. In fact I shoot my entire reception with 35mm.
- When it comes to walking down the aisle shot, there are 2 camps : some people prefer long lens (70-200) while camping at the altar as the bride approaches, but I prefer shorter lens while walking in sync with the bride down the aisle. The reason is - I can generally shoot wide open and still nail the focus because I'm keeping pace with the subject. If I camp, I gotta either pre-focus on a certain spot, or shoot slightly stopped down to make sure I nail it. You may think servo will help you here, but I advise you not to rely on servo for what is probably the single most important shot during the wedding.
Good luck, I'm sure you'll do fine.