ooo more cool toys! not something i'd invest in as an amateur, but nifty nonetheless. i agree with dean, though. once i started project365 & was taking lots of photos i quickly discovered how ugly they usually look with flash XP not that mine always turn out well in either case, but i'm getting better & better
to think of all the research that went into blocking UV light from the film as it ruined many a sunny pictures and now someone is using it for something besides UV photography... which is unique by itself
FWIW, I prefer to avoid flash altogether. I know that some situations call for it but whenever possible I use ambient light. Just my preference.