If you're looking for better light using your on-camera flash Photek's Hot Shoe Diffuser Kit w/o Umbrella (46) fits the bill: you get a diffuser panel for a 46 umbrella (umbrella not included) with an opening for a hot shoe flash (flash not included)...
If you're looking for better light using your on-camera flash Photek's Hot Shoe Diffuser Kit w/o Umbrella (46) fits the bill: you get a diffuser panel for a 46 umbrella (umbrella not included) with an opening for a hot shoe flash (flash not included)...