At the last mac meetup, the rest clicked away with cameras. I chipped in with the MacBook Pro using PhotoBooth.

Two other apps helped: iGlasses (US$10) made the indoor photos brighter (you can use it with iChat as well) and FlickrBooth (donationware) which uploaded the photos to my Flickr album immediately (there was Wireless@SG).
PhotoBooth with these accompaniments usually come in useful when photographing my cats, and it did fine with these two as well.