My take on juxtaposition, although I haven't had time to shoot any examples, is an image of two (or more) objects that are related to each other in some way. Gunsan's chicken/egg image is a good example. I had heard somewhere that Shaqil O'Neil and that little guy who played Mini-Me in the second Austin Powers movie are supposed to be good friends. A photo of them hanging out together would be a very good example of juxtaposition. The trick, I think, with juxtaposition is to get the viewer to recognise what the relationship between the objects is. The fun thing about juxtaposition is that it opens the door to visual jokes, such as a "No Swimming" sign posted in front of a frozen pond. A disabled car with a wheel that is falling off, parked in front of a tire store with a sign over it announcing a half off sale is another good one. Finding good juxtaposition subjects, however, takes time, and I don't know if one month will be long enough.