Olympus FL-14 Flash – How Useful on the E-P1? – Peter K. Burian:
Because of the small size of the E-P1, M. Zuiko lenses and the FL-14 flash, the Micro Four Thirds system is ideal for taking photos during events and family outings when you don’t want to carry a large/heavy camera bag. It’s great for snap shooting with Intelligent Auto mode but equally suitable for serious photography using any of the many creative features and overrides.
Peter has also provided a sample photo of "Zoltan the Adequate" where the FL-14 was as a fill flash. Peter says:
While the E-P1 accepts the full-size Olympus flash units, the FL-14 is much more compact and adequately powerful for use with the short focal length lenses. For most testing, I used it outdoors to provide fill-lighting under harsh illumination or in deeply shaded locations.