I've been shooting for years, with entry level pro film SLRs and last spring tipped my toes into digital with the Nikon P90 (I believe the newest incarnation is the P100). I have the opportunity to shoot some used gear (musical instruments) to advertise on my employer's website, and I've been invited to shoot my friend's wedding in July, and it just now has occured to me to think about lighting OTHER than the wimpy one that come standard with every camera. Silly, huh? I suppose my question is this: do ALL external flash units have to attach to the camera in some way? I suppose I had thought perhaps you were expected to work them independently - I don't know. I DO know that my camera won't accept interchangeable flash units - what I have is what I have. My only digital camera is a glorified point-n-shoot, and though I can tweak the manual settings and whatnot, it's still not a professional tool. I've no $$ for an upgrade, so this is what I have to work with. I'm not concerned about my photos at work - we're getting a good backdrop and there's an umbrella shade and some real lighting there - but I absolutely do not want to mess up a wedding. So what's the verdict?