in the household hints from (alleged) white collar criminals department: we've been having a fruit fry issue because of our indoor compost receptacle (where the compost goes before we take it outside) and because it's been so warm, any fruit we have out is ripening like CRAZY. so anyway, i happened to read in martha stewart living that if you put a shallow bowl of apple cider vinegar out, cover it with plastic wrap, and poke a few holes in the plastic wrap, the fruit flies get attracted to the vinegar, go in a hole in search of something good and get trapped in the bowl and drown. and lo and behold it really works. from saturday afternoon to this afternoon, we caught a baker's dozen of fruit flies. YEE HA!
other fruit fly tricks-put out some basil (they don't like it), or put a piece of fruit in a glass with some water in the bottom, put a paper funnel in the top of the glass and again, they go in and can't figure out how to get out, and then they drown.